Sagot :
bonjour
a = 3 x - 5 + 2 x + 7
= 5 x + 2
b = 4 x + 2 - 3 x
= x + 2
c = 6 x - 15 + x² - 7 + x²
= 6 x - 22
d = 3 x² + x + 4 x² - 4 x
= 7 x² - 3 x
Réponse :
a. 3×x - 5+(2×x +7)
b. 4×x-(-2+3×x)
c. 3×(2×x-5+2×x)-(7 – 2×x)
d. 3x2 + x + 4(2×x – x)