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a fost răspuns

Fie nr :
A=2x-3+a la puterea 2
B=5+4x-7a la puterea 2
C=11-9x
Calculati:
d)A+(B-C)
e)-A+B-C
DAU FUNDA!!!!

Răspuns :

Renatemambouko
d)A+(B-C) =(2x-3+a²)+(5+4x-7a²)-(11-9x)=
=2x-3+a²+5+4x-7a²-11+9x=
=15x-6a²-9

e)-A+B-C=-(2x-3+a²)+(5+4x-7a²)-(11-9x)=
=-2x+3-a²+5+4x-7a²-11+9x=
=11x-8a²-3

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