SOLUTION: which expression is eqivalent to 7 square root of 90? (1) 16 sqaure root 10 (2) 21 square root 10 (3) 70 square root 9 (4) square root 630

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Question 285967: which expression is eqivalent to 7 square root of 90?
(1) 16 sqaure root 10
(2) 21 square root 10
(3) 70 square root 9
(4) square root 630
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
7%2Asqrt%2890%29+=+7%2Asqrt%289%2A10%29
7%2Asqrt%289%2A10%29+=+7%2Asqrt%289%29%2Asqrt%2810%29
7%2Asqrt%289%29%2Asqrt%2810%29+=+7%2A3%2Asqrt%2810%29
7%2A3%2Asqrt%2810%29+=+21%2Asqrt%2810%29
The answer is (2)