bonjour
A=2³+2²(2²×3-3²)
= 8 + 4 ( 4 * 3 - 9)
= 8 + 4 ( 12 - 9)
= 8 + 4*3
= 8 + 12
= 20
B=(7²-7×5)÷(7×2¯³)-2²
= ( 49 - 35 ) : ( 7/8) - 4
= 14 x 8/7 - 4
= 112/7 - 4
= 16 - 4
= 12
20 - 12 = 8
8 = 2 ³
Réponse :
A=2³+2²(2²×3-3²)
= 8 + 4(4x3-9)
=8+ 4 x 3
= 8 + 12
=20
B= (7²-7×5)÷(7×2¯³)-2²
= (49-35)/(7 x(1/8)) - 4
=14/7/8 -4
=16 - 4
=12
A-B=20 - 12=8=2³
Explications étape par étape
