## happykiddo 3 years ago solve the equation by finding the square root x^2-9=0 i got x=4 + or - √4

1. anonymous

how did you get 4...

2. anonymous

i think you meant to type 3

3. anonymous

|dw:1360110109271:dw| to solve by square root; get the x^2 term by itself and take the square root of each side.

4. happykiddo

i posted the answer for the wrong question. sorry. would you be willing to help again heres the my actual question 2x^2-64=0 and i got x=4 + or - √4 for this question

5. anonymous

$2x ^{2}=64$ $x ^{2}=32$ $x=+-\sqrt{32}$

6. happykiddo

could i simplify √32 ?

7. happykiddo

like x=-6+- √27 can be simplified into x=-6+- 3√3

8. anonymous

of course it would be $\sqrt{16\times2}$ so $\sqrt{16}\times \sqrt{2}$=$4\sqrt{2}$

9. anonymous

exact @happykiddo

10. happykiddo

thanks alot :)

11. anonymous

u're welcome!