Question

Solve. 2x^2 + x = 15.

Answer 1

use -b formula, where a=2 b=1 and c=-15,

Answer 2

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

Answer 3

2x^2 + x - 15 = 0
2x^2 +3x - 5x - 15 = 0
2x(x +3 ) - 5(x + 3) = 0
(2x - 5 )(x + 3) = 0

Answer 4

x = 5/2 . -3

Answer 5

x = 5/2 and x = -3