Question

- 6x ²+ 40x = -90 - 8x

Answer 1

-6x²+40x=-90-8x

36x+40x=-90-8x
76x+8x=-90
84x=-90
x=-90/84
x=-1,07

Answer 2

- 6x² + 40x= -90-8x
-6x² +40x+8x= -90
- 6x² +48x² = -90
42x²= - 90
x² = -90/ 42
= - 2,1