Question

I'm having trouble solving this

2x^2 - 8x = -7

So far I have,

2x^2 - 8x + 7 = 0

Then I plug into the quadratic formula for -

8 +- sqrt{-8^2 - 4(2)(7)}/2(2)

8 +- sqrt{8}/4

Answer 1

What's wrong?

Answer 2

I have to simplify 8 +- sqrt{8}/4

Answer 3

hold on and i will post the choices

Answer 4

-2 +- sqrt{2}

-2 +- 2sqrt{2

2 +- sqrt{2}/2 and everything is over 2

2 +- sqrt{2}/2 and only the square root of 2 is over 2

Answer 5

Simplify? Just divide the numerator and denominator by 2. Notice that \(\sqrt8\) is \(2\sqrt2\)

Answer 6

so it is 2 +- sqrt{2}/2 with everything over 2?

Answer 7

Exactly. Good work

Answer 8

thank you!

Answer 9

You are welcome