Question

Is my answer right??? ;)

Solve. 2x2 - 8x - 20 = 0

My answer: x = 4 ± 2 sq root 7

Answer 1

x2 -4x -10 = 0
using the quadratic formula.
\[x = 2 \pm \sqrt{14}\]

Answer 2

A good way to check your answers is with wolframalpha: http://www.wolframalpha.com/input/?i=2x%5E2-8x-20%3D0

Clearly your answer is wrong unfortunately.

Answer 3

thank you!

Answer 4

I needed to revise the square root part, my error