Can someone help me multiply (-2+square root of 7)(-2-square root of 7) and how to get the answer step by step

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asked Jul 10, 2021 114k views

4 votes

Can someone help me multiply (-2+square root of 7)(-2-square root of 7) and how to get the answer step by step

Mathematics
college

Stockton asked

by Stockton

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2 Answers

3 votes

Answer:

Explanation:

Simply multiply the radicals to get the answer.

Msharp answered Jul 12, 2021

by Msharp

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2 votes

Answer: -3

(-2-√(7))(-2+√(7))=(-2).(-2)-2√(7)+2√(7)-7=4-7=-3

Explanation:

Kergoth answered Jul 15, 2021

by Kergoth

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