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Sagot :

Bonsoir,

A=5+(2y+3)

= 5+2y +3

= 2y +8

B=5a-(3-4a)

= 5a-3 +4a

= 9a -3

C=(t-4)-6

= t-4-6

= t -10

D=2a-(4a ² +2a-7)

= 2a -4a² -2a +7

= -4a² +7

E=8y-(5y+2)+(3-4y)

= 8y -5y -2 +3 -4y

=  -y +1

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