Asked by Ciara

2x^2-x-28=0
Completing the square.

Answers

Answered by Steve
2x^2-x-28 = 0
2(x^2 - 1/2 x) = 28
2(x^2 - 1/2 x + (1/4)^2) = 28 + 2(1/4)^2
2(x - 1/4)^2 = 225/8
(x - 1/4)^2 = 225/16
x - 1/4 = ±15/4
x = 1/4 ± 15/4
x = -7/2, 4
Answered by Ciara
Okay, so I also got the same answer using the Quadratic Formula. Is that okay to happen?
Answered by Steve
it better happen!
There is only one correct answer...

Of course, the problem said to complete the square.
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