Question

Solve. 2x2 – 8x – 14 = 0

A.x = 4 ± 3√2
B.x = 2 ± 2√7
C.x = 4 ± √3
D.x = 2 ± √11

Answer 1

Use quadratic equation to solve for x.

Answer 2

Did you try? the first thing I would do is factor out a 2 from each term
2(x^2-4x-7)=0
divide both sides by 2
x^2 -4x-7= 0/2 or
x^2 -4x-7= 0

now do the quadratic formula
See http://www.khanacademy.org/math/algebra/quadratics/v/applying-the-quadratic-formula