Bonsoir
⚠️Développer ces expressions⚠️
A= 5(x+4) = 5x + 20
B= y(8-y) = 8y - y²
C= -3(a-5) = - 3a + 15
D= 3b(-b+2) = - 3b² + 6b
⚠️Factoriser ces expressions⚠️
E= 4×7+4×x = 4 (z + x)
F= 2×a-9×a = a (2 - 9)
G= -48+8y = 8 (- 6 + y)
H= 9z-12 = 3 (3z - 4).
