3 years ago

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

Mathematics

1 answer:

Scilla [17]3 years ago

6 0

Answer:

$7x^2+28x$

Step-by-step explanation:

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

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I am having trouble with question 7 onwards to q10 anyone mind helping/teach me?

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2 years ago

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DerKrebs [107]

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3 years ago

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