### All PSAT Math Resources

## Example Questions

### Example Question #71 : Exponents

Simplify by rationalizing the denominator:

**Possible Answers:**

**Correct answer:**

Multiply both numerator and denominator by :

### Example Question #71 : Exponents

Divide:

**Possible Answers:**

**Correct answer:**

Rewrite in fraction form, and multiply both numerator and denominator by :

### Example Question #513 : Algebra

Simplify by rationalizing the denominator:

**Possible Answers:**

**Correct answer:**

Multiply both numerator and denominator by :

### Example Question #514 : Algebra

Simplify by rationalizing the denominator:

**Possible Answers:**

**Correct answer:**

Multiply the numerator and the denominator by the complex conjugate of the denominator, which is :

### Example Question #1 : How To Divide Complex Numbers

Simplify by rationalizing the denominator:

**Possible Answers:**

**Correct answer:**

Multiply the numerator and the denominator by the complex conjugate of the denominator, which is :

### Example Question #1 : Complex Numbers

Simplify by rationalizing the denominator:

**Possible Answers:**

**Correct answer:**

Multiply the numerator and the denominator by the complex conjugate of the denominator, which is :

### Example Question #1 : How To Divide Complex Numbers

Define an operation as follows:

For all complex numbers ,

.

Evaluate .

**Possible Answers:**

**Correct answer:**

Multiply the numerator and the denominator by the complex conjugate of the denominator, which is . The above becomes:

### Example Question #79 : Exponents

Define an operation as follows:

For all complex numbers ,

.

Evaluate .

**Possible Answers:**

**Correct answer:**

### Example Question #71 : Exponents

Define an operation as follows:

For all complex numbers ,

Evaluate .

**Possible Answers:**

**Correct answer:**

Multiply the numerator and the denominator by the complex conjugate of the denominator, which is . The above becomes: