Question

b) 5a-5c (para x= -1 e y = 2)
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Answer 1

Resposta:

A) (5a-2b)²

(5a)²-2.5a.(-2b)+(-2b)²

25a²+20ab+4b²

B) (xy-x)²

(xy)²-2.xy.(-x)+(-x)²

x²y²+2x²y+x²