How do you solve 8+9x2+5=9x2+5?

1 Answer
Oct 24, 2016

x=23,23

Explanation:

Solve: 8+9x2+5=9x2+5

Simplify.

9x23=9x2+5

Add 3 to both sides.

9x2=9x2+5+3

Add 9x2 to both sides.

9x2+9x2=5+3

Simplify.

18x2=8

Subtract 8 from both sides.

18x28=0

This is a quadratic equation of the form ax2+bx+c, where a=18, b=0, c=8.

The value for x can be determined using the quadratic formula.

Quadratic Formula

x=b±b24ac2a

x=0±024188218

Simplify.

x=±57636

Simplify.

x=±2436

Simplify.

x=±49

Simplify.

x=±23

x=23,23