Verified answer

Explications étape par étape:

ex1_

a) =14x

b) = 10y

c) = -20x

d) = -45a

e) = -3x²

f) = -10b²

g) = -12/3a² = -4a²

h) = -2x- 18 = -2(x+9)

i) = -8x - 1

j) = -11x - 8