Factor the expression
(x+2)^2-25y^4

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Use the squared identities to simplify sin^2x cos^2x

Write the fraction for the part that is shaded. then find the equivalent fraction.