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

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1. JuanitaM

how did you get 4...

2. JuanitaM

i think you meant to type 3

3. JuanitaM

|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. suivpasyonw

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

6. happykiddo

could i simplify √32 ?

7. happykiddo

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

8. suivpasyonw

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

9. suivpasyonw

exact @happykiddo

10. happykiddo

thanks alot :)

11. suivpasyonw

u're welcome!