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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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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

User Stockton
by
5.1k points

2 Answers

3 votes

Answer:

3

Explanation:

Simply multiply the radicals to get the answer.

User Msharp
by
5.3k points
2 votes

Answer: -3


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

Explanation:

User Kergoth
by
4.9k points
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