Sagot :
Réponse :
Ex 2 :
1) pour x = -2
M = 5–2(3–2x)
= 5–2(3–2 x (-2))
=5–2(3+4)
=5–2 x 7
= 5–14
= -9
b) pour x = 6
M = 5–2(3–2x)
= 5–2(3–2 x 6)
=5–2(3-12)
= 5 - 2 x (-9)
= 5 +18
= 23
2) pour x = -1
N = 2(3-2x)-(-1+3x)
=2(3-2 x (-1))-(-1+3 x (-1))
=2(3+2)-(-1-3)
= 2 x 5 - (-4)
= 10 + 4 = 14
pour x = 2
N = 2(3-2x)-(-1+3x)
= 2(3-2 x 2)-(-1+3 x 2)
= 2(3-4)-(-1+6)
= 2 x (-1) - 5
= -2 - 5
= -7
Explications étape par étape :