book Maths Puzzle Numerical Ability

I NEED HELP WITH FACTORING THIS:
18C^4 - 9C^2 + 7C

Read Solution (Total 0)

book Other Question

What would you do to simplify a quadratic expression such as 5x^3-27x^2+58x+56? solve each equation and check for extraneous solutions

sqrt 2x^2-1=x

and

sqrt x^2+5x=6