Question

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

Answers

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
Ciara
Okay, so I also got the same answer using the Quadratic Formula. Is that okay to happen?
Steve
it better happen!
There is only one correct answer...

Of course, the problem said to complete the square.

Related Questions