Place the indicated product in the proper location on the grid. 1. (a + b)(a 2 - ab + b 2) 2. (1 - 7x)(1 + 9x) 3. (x + y + 3)(x + y - 4) 4. (a - b)(a 2 + ab + b 2) 5. (m 3 n + 8)(m 3 n - 5) 6. [4 - (3c - 1)][6 - ( 3c - 1)] 7. (ab - 9)(ab + 8) 8. (a + b - c)(a + b + c) 9. (a + 3)(a - 2) 10. (3m 3 - y)(3m 3 - y) 11. (2x - 3y)(4x - y) 12. place the indicated product in the proper location on the grid. write your answer in descending powers of x. (x 2 + 2x - 1)(x 2 + 2x + 5) 13. which of the following polynomials corresponds to the product of the multivariate polynomials 4x - 3y + 5 and x + 2y -3? 5x - y + 2 4x 2 - 6y 2 - 15 4x 2 + 8xy - 12x - 3y + 5 4x 2 - 6y 2 + 5xy - 7x + 19y - 15