June 2021 0 85 Report
Reduire chaque expression.


a) 7x + 3 + 5x + 6
b) -4y + 9 - 5y - 7
c) 8a - 9 - 12a + 3
d) 15b² + 3b - 9b² - 5.

Developper, puis reduire chaque expression.
a) 6(-4x - 5) + 7
b) - 5(6 - 4y) - 5y
c) 5( - 2a + 7) + 3a
d) 3b( 5 - 6b) - 9b.
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