All Basic Arithmetic Resources
Example Question #13 : Operations In Expressions
Factor the following expression completely:
To factor an expression in the form , we need to find factors of that add up to .
In this case, and .
Start by listing factors of 24 and adding them up. You want the one that adds up to 10.
Because 4 and 6 are the factors that we need, you can then write
To check if you factored correctly, you can multiply the two factors together. If you end up with the original expression, then you are correct.
Example Question #2 : Factoring
Factor the following expression completely
First, we need to factor the numerator and the denominator separately.
To factor an expression with the form , we will need to find factors of that add up to be.
For the numerator, , and .
Write down the factors of and add them up.
Since and add up to ,
Now, do the same thing with the denominator, .
Since and add up to , .
Now, stack these factors up as fractions:
Since both the numerator and denominator have the factors (x+6), they cancel each other out because they divide to 1.
Example Question #14 : Operations In Expressions
Factor the following expression:
When you factor an expression, you are separating it into its basic parts. When you multiply those parts back together, you should obtain the original expression.
The first step when factoring an expression is to see if all of the terms have something in common. In this case, , , and all have an which can be taken out:
The next step is to focus on what's in the parentheses. To factor an expression of form , we want to try to find factors , where and . We therefore need to look at the factors of to see if we can find two that add to :
We've found our factors! We can therefore factor what's inside the parentheses, , as . If we remember the we factored out to begin with, our final completely factored answer is:
Example Question #132 : Basic Arithmetic
This question requires you to understand order of operations, which is represented by the acronym "PEMDAS": parentheses, exponents, multiplication and division, addition and subtraction.
Solve the expression within the parenthesis first, beginning with multiplication:
The next operation in the order of operations is division.
Finally, use addition to solve the equation:
Example Question #133 : Basic Arithmetic
To factor an equation in the form , where and , you must find factors of that add up to .
List the factors of 36 and add them together:
Since , is the factor we need. Plug this factor in to get the final answer.