Bonsoir
-3x + 4 = 2x - 6
-3x - 2x = - 4 - 6
-5x - 10 = 0
x = -10/-5
X = 2
2(2x + 3) - 4x ( 2x + 3) = 0
4x + 6 - 8x² - 12x = 0
- 8x² - 8x + 6 = 0
∆ = (-8)² - 4(-8)(6)
= 256
x = -b - √∆ / 2a = 8 - √256 / -16
X = 1/2
x = -b + √∆ / 2a = 8 + √256 / -16
X = - 3/2