How do you solve 2x2+7=2x?

1 Answer
May 2, 2017

x=12±152

Explanation:

2x2+7=2x

subtract 2x from both sides and set the equation equal to 0:
2x22x+7=0

plug the values (a=2,b=2,c=7) into the quadratic formula:

x=(2)±224(2)(7)2(2)

x=2±604

The discriminant b24ac>0
so, there are two real roots.

x=2±2154

x=24±2154

x=12±152