0. Review of Algebra

In Exercises 15–32, multiply or divide as indicated. (x+5)/7 ÷ (4x+20)/9

In Exercises 15–58, find each product. (2x−5)(7x+2)

In Exercises 15–32, multiply or divide as indicated. (x^2−4)/(x−2) ÷ (x+2)/(4x−8)

Add or subtract, as indicated. See Example 2. 3(8p^2-5p) - 5(3p^2-2p+4)

In Exercises 23–34, find each product using either a horizontal or a vertical format.(a−b)(a²+ab+b²)

Add or subtract, as indicated. See Example 2. -(8x^3+x-3) + (2x^3+x^2) - (4x^2+3x-1)

In Exercises 23–34, find each product using either a horizontal or a vertical format.(x²+2x−1)(x²+3x−4)

In Exercises 29–40, add the polynomials. Assume that all variable exponents represent whole numbers.(−6x³ + 5x² − 8x + 9) + (17x³ + 2x² − 4x − 13)

Find each product. See Examples 3–5. (14r-1)(17r+2)

In Exercises 15–32, multiply or divide as indicated. (x^2−4)/(x^2+3x−10) ÷ (x^2+5x+6)/(x^2+8x+15)

In Exercises 15–32, multiply or divide as indicated. (x^3−25x)/4x^2 ⋅ (2x^2−2)/(x^2−6x+5) ÷ (x^2+5x)/(7x+7)

In Exercises 15–58, find each product. (x+5)(x−5)

Find each product. See Examples 3–5. 2b^3(b^2-4b+3)

Find each product. See Examples 3–5. (2z-1)(-z^2+3z-4)

In Exercises 15–58, find each product. (5−7x)(5+7x)