Multiply these polynomials. (5x2 + 2x)(3x2 - 7x + 4) a. 15x4 - 29x3 + 20x2 + 8x b. 15x4 - 35x3 + 6x2 + 8x c. 15x4 - 29x3 + 6x2 + 8x d. 15x4 - 35x3 + 20x2 + 8x

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103