Algebra II

The square root property says that if x ² = c, then or . This can be written as “if x ² = c, then .” If c is positive, then x has two real answers. If c is negative, then x has two imaginary answers. 

Example 1

Solve each of the following equations.

1. x ² = 48 
2. x ² = –16 
3. 5 x ² – 45 = 0 
4. ( x – 7) ² = 81 
5. ( x + 3) ² = 24 
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