Bonsoir,
a) D = (2x + 3)² + (2x + 3)(7x - 2)
x = -6
(2 × (-6) + 3)² + (2 × (-6) + 3)(7 × (-6) - 2)
= (-12 + 3)² + (-12 + 3)(-42 - 2)
= (-9)² + -9 × (-44)
= 81 + 396
= 477
b) E = 36 - (3x + 5)²
x = 0
36 - (3 × 0 + 5)²
= 36 - (0 + 5)²
= 36 - 5²
= 36 - 25
= 11
En espérant t'avoir aidé(e).
