## anonymous one year ago Solve x2 = 144. 72 12 ±12 −12

1. freckles

well what numbers squared give you 144?

2. freckles

here is example: solve x^2=9 well 3^2 and (-3)^2 both give by 9 so x=3 or x=-3 are both solutions to x^2=9

3. freckles

there are two solutions if you take the square of both sides you need to be careful of how you interpret sqrt(x^2) this actually is the same thing as |x| so $x^2=144 \\ \sqrt{x^2}=\sqrt{144} \\ |x|=12 \\$ this will give two solutions (not just one)

4. anonymous

Thanks

5. condor34

x= positive or negative 12