book Maths Puzzle Numerical Ability

Can you explain how to solve this in detail? Thank you.

Factor completely:
4x2 - 36y2

Factor completely:
3x2 - 2x - 8

Factor completely:
24x2 + 10x - 4

Read Solution (Total 0)

book Other Question

Find the area of the trapezoid at the right by combining the area of the triangle and the area of the rectangle. Now I don't really know how to explain how this figure looks but I graph the ellipse x^2 + 4y^2 =64