(4 . x + 1/2 y)^2 é igual a?
(A) 16x^2+4xy+0,5y^2
(B) 4x^2+8xy+0,5y^2
(C) 16x^2+4xy+0,25y^2
(D) 16x^2+0,25y^2
(E) 4x^2+0,5y^2
(A) 16x^2+4xy+0,5y^2
(B) 4x^2+8xy+0,5y^2
(C) 16x^2+4xy+0,25y^2
(D) 16x^2+0,25y^2
(E) 4x^2+0,5y^2
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(4x)^2 + 2 (4x) (1/2y) + (1/2y)^2
16x^2 + 8x (1/2y) + 1/4y^2
16x^2 + 8/2xy + 1/4y^2
16x^2 + 4xy + 1/4y^2
OU
16x^3 + 4xy + 0,25y^2
Respista e a letra C)