I think the answer should be ‘‘D’’. whereas, in the answer section of manhattan 5 lb the answer is ‘‘B’’.

Because we don’t know if any of r or s is negative, we shouldn’t assume that if we cancel out r in the first expression and s in the second expression both of them would be positive.

If you simplify lhs and rhs, you will be left with rs on both sides with fraction. rs is already given, and as we are not comparing r and s, we don’t need to bother on signs

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The answer is B.

Before looking at the answer why don’t you try one more time and see if you bring anything new to the table.

If you have any doubts leave them here.

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got it. You are right. in both cases, the minus signs cancels out.

thanks a lot

got it. You are right. in both cases, the minus signs cancels out.

thanks a lot.