Bonjour,
A=
7-130 +(15)*2
= -123 +30 =-93
B=
11 + 2*( -3-21)
= 11+2 * -24
= 11 -48 = -37
C=
-4 +(-2) * (-33,5 - 33,5)
= -4 +(-2) * -67
= -4 +134= 130
-93 -37 +130= -130+130= 0
vrai
Réponse:
vrai.
Explications étape par étape:
A = 7+13x(-10)-5x(-3)x2
= 7+(-130)+30
= -93
B = 11+2x(-3+3x(-7))
= 11+2x(-24)
= 11+(-48)
= -37
C = -5x0,8+(-2)x(-33,5-5x6,7)
= -5x0,8+(-2)x(-67)
= -4+134
= 130
A+B+C = -93+(-37)+130 = 0
