Using factor theorem factorise each of the following x^4 - 7x^3 + 9x² + 7 x – 10

Please fast

(x + 1)(x - 1) (x- 2)(x - 5)

Step-by-step explanation:

Solving in steps:

x^4 - 7x^3 + 9x² + 7 x – 10=(x^4 - 1 )- (7x^3 - 7x) + (9x^2 - 9) = (x^2 + 1)(x^2 - 1) - 7x(x^2 - 1) + 9(x^2 - 1) = (x^2-1)(x^2 + 1 - 7x + 9) = (x + 1)(x - 1)(x^2 - 7x + 10) = (x + 1)(x - 1)((x^2 - 2x) - (5x - 10)) =(x + 1)(x - 1) (x- 2)(x - 5)