## donnie1999 one year ago HELP ME PLEASE!!! Solve the equation x^2 = 64 for x I got the answer 8 but i'm not sure if that's wright. @skullpatrol

1. donnie1999

@mathstudent55

2. anonymous

$x^2 = 64 \implies x = \pm 8$

3. donnie1999

so is it 32?

4. donnie1999

@iambatman

5. anonymous

$$\pm$$ means plus minus $$\pm8$$ is defined as $$+8,-8$$

6. anonymous

to see why, test what is $$(-8)^2$$

7. anonymous

Sorry to confuse you donnie, yes what jenny said :)

8. donnie1999

its 64

9. donnie1999

@jenny1994 so would the answer be -8,8

10. anonymous

batman gave you your answer, it's \pm8 or 8,-8 if you're only given positive choices, then it's just 8

11. donnie1999

lol that's what I thought it was since the begging