book Maths Puzzle Numerical Ability

please simplfy this
(4x^3-6x^2+5)-(x^2+7x^2-8x-2)

Read Solution (Total 0)

book Other Question

A dormitory now houses 30 men and allows 42 square feet of space per man. If five more men are put into this dormitory, how much less space will each man have? A car radiator has a capacity of 16 quarts and is filled with a 25% antifreeze solution. How much must be drained off and replaced with pure antifreeze to obtain a 40% antifreeze s