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Simplify 5√7+√7−2√7

A.4√7
B.3√21
c.3√7
d.4√21
i really am stuck on this problem.

User Zelinka
by
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1 Answer

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5√7+√7−2√7

Going from left to right:

5√7+√7 = 6√7

6√7 - 2√7 = 4√7

The answer is A. 4√7

User Ethel Patrick
by
8.8k points

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