Verified answer

bonjour

A =  3 x ( - 5) - ( 5 - 2 x 7)

= - 15 - ( 5 - 14 )

= - 15 - ( - 9 )

= - 15 + 9

=  - 6

B =  - 2 x 4 - ( - 16 ) : ( - 4 )

= - 8  - ( 4)

= - 8 - 4

= - 12

C = - 2 x 4² + ( - 5 )²

= -  32   + 25

=   - 7

Verified answer

bjr

on commence par les multiplications (ou quotient) et les calculs dans les (   ) - priorités de calculs vues en cours..

A = 3 x (-5) - (5 - 2 x 7)

A = - 15 - (5 - 14)

A = -15 - (-9)

A = -15 + 9

A = -6

B = -2 x 4 - (-16) : (-4)

B = - 8 - (+4)

B = -8 - 4

B = -12

C = -2 x 4² + (-5)²

C = -2 x 16 + 25

C = -32 + 25

C = -7