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Sagot :

Bonjour !

a)

R(x) = (5x - 2)(x + 3) + x(5x - 2)

R(x) = (5x - 2)[(x + 3) + x]

R(x) = (5x - 2)(2x + 3)

b)

S(x) = (8x - 1)(2x + 3) + 8x - 1

S(x) = (8x - 1)(2x + 3) + (8x - 1)*1

S(x) = (8x - 1)(2x + 4)

J'espère t'avoir aidé. Bon courage !

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