Education.com
Try
Brainzy
Try
Plus

# Algebra for Nursing School Entrance Exam Study Guide (page 3)

By
Updated on Aug 12, 2011

### Squares and Square Roots

It's not uncommon to see squares and square roots on standardized math tests, especially on questions that involve right triangles.

To find the square of a number, multiply that number by itself. For example, the square of 4 is 16, because 4 × 4 = 16.Mathematically, this is expressed as:

42 = 16

4 squared equals 16.

To find the square root of a number, ask yourself, "What number times itself equals the given number?" For example, the square root of 16 is 4 because 4 × 4 = 16.Mathematically, this is expressed as:

The square root of 16 is 4.

Because certain squares and square roots tend to appear more often than others on standardized tests, the best course is to memorize the most common ones.

### How to Solve an Equation

Example: 5 – 2(3x + 1) = 7x – 8
1. Remove parentheses by distributing the value outside to both values within:
5 – 6x – 2 = 7x – 8
2. If there are like terms on the same side of the equal sign, combine them:
3 – 6x = 7x – 8
3. Decide where you want all of the x terms. Put all the x terms on one side by addition and subtraction:
4. Get all the constants on the other side by addition and subtraction:
5. Isolate the x by performing the opposite operation:

The practice quiz for this study guide can be found at:

Mathematics for Nursing School Entrance Exam Practice Problems