Question

can you pls help me?
Which pair of radicals is a pair of like radicals?
A. 9*(sqrt)*2 and -9*(sqrt)*3
B. 7*(sqrt)*5 and 7*(sqrt)*3
C. 5*(sqrt)*6 and 6*(sqrt)*5
D. 3*(sqrt)*7 and 11*(sqrt)*7
((will medal))
(((dont have to give me the answer if you dont want too)))

Answer 1

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Answer 2

What is a "like radical"?