Which choice is equivalent to the expression below? √28+8√7 A.8√35 B.12√7 C.10V7 D.9V35

asked Mar 19, 2015 87.3k views

5 votes

Which choice is equivalent to the expression below?

√28+8√7

A.8√35
B.12√7
C.10V7
D.9V35

by GregK

6.6k points

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3 votes

$√(28)+8\sqrt7=\\ 2\sqrt7+8\sqrt7=\\ 10\sqrt7$

Rigel Glen answered Mar 20, 2015

6.6k points

3 votes

$√(28)+8\sqrt7=√(4\cdot7)+8\sqrt7=\sqrt4\cdot\sqrt7+8\sqrt7=2\sqrt7+8\sqrt7=10\sqrt7\\\\Answer:C.$

Jaysen answered Mar 24, 2015

7.4k points

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