June 2021 2 113 Report
Supprimer les parentheses.

a) - 5 + ( - a + 2b)
b) 9 - (- x + 3y)
c) - a - (- 5 + b - c)
d) 9 + (-x² - x + y)


Spprimer les parentheses.
a) 7a + (-5 + 2b - c)
b) -5 - (- x² + 4x)
c) b - (- a + 6c - 5)
d) -3z + (x - y - 2)
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