Question

can anyone explain to me how to do this:
2x^2 - 54 = 284

Answer 1

this is what i got but i dont think it's right;

x^2 - 54 = 142
+54 +54
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x^2 = 196
Square Root of 196 = 14 ?

Answer 2

add 54 to both sides

2x^2 = 338

divide by 2

x^2 = 169

take the square root which will give a positive and negative solution

\[x=\sqrt{169} = \pm 13\]

Answer 3

ooh, i divide by 2 first.

Answer 4

thanks!! :)

Answer 5

54/2 = 27

Answer 6

and can you check 2 more for me? :)

Answer 7

yep

Answer 8

7n^2 = 63

Divided by 6 = n^2 = 9

n = (3, -3)

Answer 9

divide by 7

n^2 = 9

\[n = \sqrt{9}= \pm 3\]

Answer 10

okay thank you! one more problem.

Answer 11

can you explain to me how to solve this kind of problem?