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16-03-2018
Mathematics

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7x(x+4)

A. 7x^2+4
B. 7x^2+28x
C.8x+4
D.8x+11

Respuesta :

29-12-2018

Use distributive property:

a(b + c) = ab + ac.

7x(x + 4) = (7x)(x) + (7x)(4) = 7x² + 28x

Answer: B. 7x^2 + 28x

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