Solving Quadratics by the Square Root Property
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.

x ^{2} = 48

x ^{2} = –16

5 x ^{2} – 45 = 0

( x – 7) ^{2} = 81

( x + 3) ^{2} = 24




