Question

X2-2x-x+2-x2+3x+2x-6=14-x2+4x+3x-12

Answer 1

-6=-x^2+7x+2

-x^2+7x+8=0

Delta= 49 -4*-1*8

delta= 49 + 32

delta= 81

x1 = (- 7 + 9)/-2

x1 = -1

x2= (-7 - 9)/-2

x2= 8