Question

Which statement is true about the product square root of 2(5 + square root of 8)?

A).It is rational and equal to 7.
B).It is rational and equal to 9.
C).It is irrational and equal to 4 + square root of 10.
D).It is irrational and equal to 4 + 5square root of 2.

Answer 1

sqrt2(5+sqrt8) = 5sqrt2 +sqrt16 = 4+5sqrt2 so result that choice D. is right sure