Download 6.4 Equations with Squares

6.4 EQUATIONS WITH SQUARES
REMEMBER
 5
2

 5
2

 25 
When we take the square root of a number (or an
expression), we must remember to use the 
SQUARE ROOT PROPERTY OF
EQUALITY
If two positive numbers are equal, then their
positive square roots are equal.
If
a  b,
then
a b
SOLVE
x 2  81
SOLVE
 x  3
2
 25
SOLVE
 x  6
2
 100
SOLVE
 2 x  3
2
 81
SOLVE
 3x  2 
2
9
SOLVE
(EXTRA CHALLENGE)
2   3x  1  66
2
SOLVE
 3x  5
2
 49
HOMEWORK

P228 #1 – 30 odd, 31 – 40 every other odd