7x(x+4) 7x^2+4 7x^2+28x 8x+4 8x+11

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asked Dec 19, 2021 70.6k views

1 vote

7x(x+4)
7x^2+4
7x^2+28x
8x+4
8x+11

Mathematics
middle-school

Pyae Sone Nyein asked

by Pyae Sone Nyein

3.7k points

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1 Answer

5 votes

Answer:

7x^2+28x

Explanation:

$7x(x+4)\\\\Multiplication\ is\ distributive\ on\ addition\\\\\Rightarrow 7x(x+4)=7(x* x+x* 4)\\\\7x(x+4)=7(x^2+4x)\\\\Multiplication\ is\ distributive\ on\ addition\\\\\Rightarrow 7x(x+4)==7* x^2+7* 4x\\\\7x(x+4)=7x^2+28x$

David Moorhouse answered Dec 26, 2021

by David Moorhouse

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