Bonjour
152)
A = (2x + 3) (x - 1)
A = 2x² - 2x + 3x - 3
A = 2x² + x - 3
B = (3x + 4)²
B = 9x² + 24x + 16
C = (x - 5)²
C = x² - 10x + 25.
153)
A = (2x - 1)² - 4x (2x + 3)
A = 4x² - 4x + 1 - 8x² - 12x
A = 4x² - 8x² - 4x - 12x + 1
A = - 4x² - 16x + 1
B = (3x - 2) (x + 1) + (x + 2)²
B = 3x² + 3x - 2x - 2 + x² + 4x + 4
B = 3x²+ x² + 3x + 4x - 2x - 2 + 4
B = 4x² + 5x + 2
