book Maths Puzzle Numerical Ability

simplfy the expression (1/x-1/b) / (1/xb + 1/2).
i get x-b/2xb but i am not sure i am right.

Read Solution (Total 0)

book Other Question

(x^2+2)^2

please help
show work A water balloon is dropped from a cliff. Exactly 3 seconds later the sound of the balloon hitting the ground reaches the top of the cliff. How high is the cliff?