Question

Which expression is equivalent to: http://s26.postimg.org/r58c177ax/Capture.png

Answers: http://s26.postimg.org/y9q5a8ek9/34554.png

Answer 1

expand each of the options in turn until you get the correct option

Answer 2

I'll do the first for you:-
4hj(20 +16hj + 9j) = 80hj + 64h^2j^2 + 36hj^2

now check this against the expression in your first link

Answer 3

are they the same?