### All Algebra 1 Resources

## Example Questions

### Example Question #21 : How To Factor A Trinomial

Factor the following trinomial:

**Possible Answers:**

**Correct answer:**

To factor the trinomial, its general form given by , we must find factors of the product that when added together give us .

For our trinomial, and . The two factors that fit the above rule are and , because and .

Using the two factors, we can rewrite the term as a sum of the two factors added together and multiplied by x:

Now, we must factor by grouping, which means we group the first two terms, and the last two terms, and factor them:

Note that after we factored the two groups of terms, what remained inside the parentheses is identical for the two groups.

Simplifying further, we get

, which is our final answer.

### Example Question #21 : How To Factor A Trinomial

Which of the following is a perfect square trinomial?

**Possible Answers:**

**Correct answer:**

A perfect square trinomial takes the form

,

where

Since , for to be a perfect square,

.

This makes the correct choice.

### Example Question #5 : Simplifying Polynomials

Multiply:

**Possible Answers:**

**Correct answer:**

Set up this problem vertically like you would a normal multiplication problem without variables. Then, multiply the term to each term in the trinomial. Next, multiply the term to each term in the trinomial (keep in mind your placeholder!).

Then combine the two, which yields:

### Example Question #1 : Expanding Expressions And Foil

Multiply the expressions:

**Possible Answers:**

**Correct answer:**

You can look at this as the sum of two expressions multiplied by the difference of the same two expressions. Use the pattern

,

where and .

To find , you use the formula for perfect squares:

,

where and .

Substituting above, the final answer is .

### Example Question #1961 : Algebra Ii

Evaluate the following:

**Possible Answers:**

**Correct answer:**

When multiplying these two trinomials, you'll need to use a modified form of FOIL, by which every term in the first trinomial gets multiplied by every term in the second trinomial. One way to do this is to use the grid method.

You can also solve it piece by piece the way it is set up. First, multiply each of the three terms in the first trinomail by . Second, multiply each of those three terms again, this time by . Finally multiply the three terms again by .

Finally, you can combine like terms after this multiplication to get your final simplified answer:

### Example Question #3 : Simplifying And Expanding Quadratics

Evaluate the following:

**Possible Answers:**

**Correct answer:**

When multiplying this trinomial by this binomial, you'll need to use a modified form of FOIL, by which every term in the binomial gets multiplied by every term in the trinomial. One way to do this is to use the grid method.

You can also solve it piece-by-piece the way it is set up. First, multiply each of the three terms in the trinomail by . Then multiply each of those three terms again, this time by .

Finally, you can combine like terms after this multiplication to get your final simplified answer:

### Example Question #2 : How To Multiply Trinomials

Multiply:

**Possible Answers:**

**Correct answer:**

Solving this is just like using FOIL on binomials, except we have nine calculations to perform instead of four (since that's the result of a 3x3 combination!):

First, calculate the combinations of the first term on the left:

Next, calculate the combinations of the middle term on the left:

Next, calculate the combinations of the third term on the left:

Lastly, combine the terms with compatible variables and exponents:

Thus, our answer is .

### Example Question #1 : How To Multiply Trinomials

Multiply:

**Possible Answers:**

**Correct answer:**

To solve this problem, first **FOIL** the binomial.

FOIL stands for the multiplication between the first terms, outer terms, inner terms, and then the last terms.

Now, distribute the trinomials. Start with the first term on the left:

Now the middle term on the left:

Now, the third term on the left:

Combine all compatible terms:

Thus, is our answer.

### Example Question #5 : How To Multiply Trinomials

Multiply:

**Possible Answers:**

**Correct answer:**

The easy way to perform this calculation (without using Pascal's Triangle) is to find , then square that trinomial.

So, our problem becomes

Start by distributing the first term on the left:

Now distribute the second term on the left:

Now distribute the third term on the left:

Now, combine the compatible terms:

Thus, our answer is .

### Example Question #6 : How To Multiply Trinomials

Expand and simplify the expression:

**Possible Answers:**

**Correct answer:**

We are asked to expand and simplify the expression: .

This question is going to require knowledge of exponent rules and FOIL methods.

The first step is to create an inverse reciprocal of a negative exponent.

Now, we can expand the expression by removing the exponent in the denominator.

Use the FOIL method to first multiply and .

You'll find it creates . Replace it back into the expression because we have to multiply the result by one more time.

Be careful with exponents and coefficients!

Combine like terms to find the simplified answer.