Répondre :
bonjour
A = 3 ² + ( - 2 ) ³ + ( - 1 ) ³
= 9 - 8 - 1
= 0
B = 2² - 5 x ( 21 - 2 * 9 ) ⁻¹
= 4 - 5 ( 21 - 18 ) ⁻¹
= 4 - 5 ( 3 ) ⁻¹
= 4 - 5 * 1 /3
= 4 - 5 /3
= 12/3 - 5 /3 = 7 /3
C = 5 x 1 /2 x ( 2 )²
= 5/2 x 4
= 20/2 = 10
D = 1 /2 ³ - 1 /2 ¹ x 9 + 7 x 1 /4 ¹
= 1 /8 - 9/2 + 7/4
= 1 /8 - 36/8 + 14/8
= 21/8
bonne soirée
Explications étape par étape:
A=
[tex](8 - 5) {}^{2} +(2 - 5) {}^{3} + (8 - 9) {}^{3 } \\ {3}^{2} (- {3})^{3} ( - {1})^{3} \\ = 9 - 27 - 1 \\ = - 19[/tex]