Ex 4
M= 15 b + 6b
M= 21 b
N = 10a²+4x+2a²+7-9x-2
N=12a² -5x +5
O=5x²+15x+x²-2x+5x-9
O=6x²-18x-9
P=-3a²+8-10a²+14b-5b+7
P= -13a²+9b+ 15
Exercice 5
1)
a)2x/3
b) (x+y)²
c) [tex] x^{3} [/tex]- [tex] y^{3} [/tex]
d) [tex] (2x-3y)^{3} [/tex]
e) 5*2+ 2*(5+x)= 10 + 10 + 2x= 20+2x
f) (4x)²
