book Maths Puzzle Numerical Ability

Solve x+3=|2x|by graphing f(x)= x+3 and g(x)= |2x|.

Read Solution (Total 0)

book Other Question

What is a number called that is raised to the second power? I have the following problem. I've tried working it. Am I correct?
ya^2-yb^2+xb^2-xa^2
y(a^2-b^2)+ x(b^2-a^2)
y(a+b)(a-b)+ x(b+a)(b-a)
(a+b)* (y(a-b)+ x(b-a))
-(a+b)(a-b)(y+