Question

4. Subtract: 3x2 – 5x + 7 from 5x2 - 7x + 9.​

Answer 1

Answer:

First we have to add 3x2 − 5x + 2 and − 5x2 − 8x + 9 then from the result we have to subtract 4x2 − 7x + 9. = {(3x2 – 5x + 2) + (- 5x2 – 8x + 9)} – (4x2 – 7x + 9) = {3x2 – 5x + 2 – 5x2 – 8x + 9} – (4x2 – 7x + 9) = {3x2 – 5x2 – 5x – 8x + 2 + 9} – (4x2 – 7x + 9 = {- 2x2 – 13x +11} – (4x2 – 7x + 9) = – 2x2 – 13x + 11 – 4x2 + 7x – 9 = – 2x2 – 4x2 – 13x + 7x + 11 – 9 = – 6x2 – 6x + 2-of-3x-2-5x-2-and-5x-2-8x-9-subtract-4x-2-7x-9