## anonymous 4 years ago Solve the equation using square roots.

1. anonymous

2. anonymous

x^2 - 9 = 0 --> x^2 = 9 x = ±√9 --> x = ±3

3. anonymous

$x ^{2} = 9$ so , can u find the result by yourself? ;)

4. anonymous

I dont know how to find the answer @febylailani, @miicchi

5. anonymous

i just showed you. [: i wrote x squared as x^2. x^2 -9 = 0 --> add 9 on both sides so that it becomes x^2 = 9. to check the answer i gave, just solve 3^2, or 3 * 3, and you'll get 9. so the answer is ±3. or do you have to graph it as well?

6. anonymous

@miicchi found the answer. every square root has two answer. $x ^{2} = 9$ $x = \sqrt{9}$ x = $\pm 3$ x = 3 or x = -3 got it?

7. anonymous

A. –3, 3 B. –9, 9 D. no real number solutions C. $-\sqrt{3}, \sqrt{3}$

8. anonymous

@miicchi, @febylailani , So the answer would be A?

9. anonymous

yes [:

10. anonymous

Thank you @miicchi and @febylailani

11. anonymous

yup :)

12. anonymous

uwc :)