Square Root and Cube Root

Q1:
What should come in place of both x in the equation x = 162 .
128 x

A 12

B 14

C 144

D 196

ANS:A - 12

Let x = 162
128 x
Then x2 = 128 x 162    = 64 x 2 x 18 x 9    = 82 x 62 x 32    = 8 x 6 x 3    = 144.  x 144 = 12.



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