Question

2$x^{2}$-10x+2x-10+7x-11-$x^{2}$+5x-3x-15=0

Answer 1

2x² - 10x + 2x - 10 + 7x - 11 - x² + 5x - 3x - 15 = 0
x² + x - 36 = 0
D = 1 - 4 * 1 * (- 36) = 1 + 144 = 145
$x_{1}= \frac{-1+ \sqrt{145} }{2}\\\\ x_{2} = \frac{-1- \sqrt{145} }{2}$