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Gabrielarutcov
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1.efectuati.a).5a+3a-2a b).2x(x+3)+(x+2)(x-5)

Răspuns :

a) =6a b)2x(x+3)+(x+2)(x-5)=2x²+6x+x²-5x+2x-10=4x²+3x-10
a)5a+3a-2a=(5+3-2) ·a = 6a
b)2x(x+3)+(x+2)(x-5)=
2x^2+6x+x^2+2x-5x-10 =
3x^2 + 3x -10

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