Factor completely.16×2 + 81

Solve.The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of the areas of the square and the rectangle is 48 square centimeters. Find the side of the square.

Factor.343 – x3

Factor completely.x2 – 6x + 9 – y2

Factor the polynomial completely.x5 – 7×4 – 18×3

Factor the trinomial.x2 + x – 42

Factor out the greatest common factor.12(y + 13) – x(y + 13)

Find the function.If P(x) = x – 8 and Q(x) = x2 – 11, find P(x) ∙ Q(x).

Solve the equation by completing the square.8×2 + 1 = 5x

Multiply.(8y + x)(8y – x)