Question

What is the solution set of 2x^2+x=15?

Answer 1

Answer:

x1 = -3, x2 = 5/2

Explanation:

2x^2+x-15=0

2x^2+6x-5x-15=0

2x*(x+3)-5(x+3)=0

(x+3)*(2x-5)=0

x+3=0

2x-5=0

x=-3

x=5/2