Question

(5) 5x2 + 4x -8 from 9x2 - 3x - 3
(6) 3x2 + 10x - 9 from 4x² - 8x-​

Answer 1

$(5). \\ 5x {}^{2} + 4x - 8.....(1) \\ 9x {}^{2} - 3x - 3 \\ = > 9x {}^{2} - 3x - 3 - (5x {}^{2} + 4x - 8) \\ = > 9x {}^{2} + 3x - 3 - 5x {}^{2} - 4x + 8 \\ = > 4x {}^{2} - x + 5 \\ \\ 6. \\ 3x {}^{2} + 10x - 9....(1) \\ 4x {}^{2} - 8x - ........(2) \\ = > 4x {}^{2} - 8x - (3x {}^{2} + 10x - 9) \\ = > 4x {}^{2} - 8x - 3x {}^{2} - 10x + 9 \\ = > x {}^{2} - 18x + 9$