Question

Calcule os quadrados perfeitos:

A.a^2+2a+1
B.1-4x+y^2
C.9m^2+6m+1
D.1-2y+y^2
E.x^2-14x+49
F.25x^2-10x+1

Answer 1

$a)~~a^2+2a+1=(a+1)^2 \\ \\ b)~~n\tilde{a}o~~d\'a \\ \\ c)~~9m^2+6m+1=(3m+1)^2 \\ \\ d)~~1-2y+y^2=(1-y)^2 \\ \\ e)~~ x^{2} -14x+49=(x-7)^2 \\ \\ f)~~25x^2-10x+1=(5x-1)^2$