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Va rog ex 10 dau coroana

Va Rog Ex 10 Dau Coroana class=

Răspuns :

a) =3a²b-2ab²=ab×(3a-2b)
b)=8x²+6xy+2y²-4xy-2x²-5y²+6xy+3x²+5y²=9x²+8xy+2y²
c)=7a+4b-3b-4a-7-8a+5b+12= -5a+6b+5
d)= 15a²+4ab-3b²-4a²-6ab-7b²-12a²-12a²-5ab+13b²= -a²-7ab+3b²
sp. aj.