Sagot :
Salut !
A = 2x(8 + 9)
A = 2x * 8 + 2x * 9
A = 16x + 18x
A = 34x
B = 3² + 7²
B = 3 * 3 + 7 * 7
B = 9 + 49
B = 58
C = 2 * x + 2x * 4x
C = 2x + 8x²
Voilà !
Réponse :
Bonsoir,
A = 2x(8 + 9)
= 2x * 8 + 2x * 9
= 16x + 18x
= 34x
B = 3² + 7²
= 9 + 49
= 58
C = 2 * x + 2x * 4x
= 2x + 8x²