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Sagot :

Bonjour

Calculer

A=-12 + x - (-5) - y + z

Dans les cas suivants :

1) x = 3, y = - 7 et z = -9

A=-12 + x - (-5) - y + z

A = - 12 + 3 - (- 5) - (- 7) + (- 9)

A = - 12 + 3 + 5 + 7 - 9

A = - 21 + 15

A = - 6

2) x = -8, y = 4 et z = 11

A=-12 + x - (-5) - y + z

A = - 12 + (- 8) - (- 5) - 4 + 11

A = - 12 - 8 + 5 - 4 + 11

A = - 24 + 16

A = - 8

3) x = -1/2, y = -3/2 et z= 1

A=-12 + x - (-5) - y + z

A = - 12 + (- 1/2) - (- 5) - (- 3/2) + 1

A = - 12 - 1/2 + 5 + 3/2 + 1

A = - 12 + 2/2 + 6

A = - 12 + 1 + 6

A = - 5.

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