Question

plz factorise this question by actual division this question fast I'll mark u as. the brainliest​

Answer 1

Step-by-step explanation:

By a direct checking

f(5) = 0 where f(x) = x^3 - 3x^2 - 9x - 5.

Thus, f(x) = x^2(x- 5) + 2x(x - 5) + (x - 5)

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

= (x-5)(x + 1)^2.

One can also check that f(-1) = 0 & proceed accordingly.

Answer 2

Answer:

${x}^{3} - 3 {x}^{2} - 9x - 5 \\ {x}^{3} + {x}^{2} - {4x}^{2} - 4x - 5x - 5 \\ {x}^{2} (x + 1) - 4x(x + 1) - 5(x + 1) \\ (x + 1)( {x}^{2} - 4x - 5) \\ (x + 1)( {x}^{2} + x - 5x - 5) \\ (x + 1)(x(x + 1) - 5(x + 1) \\ (x + 1)(x - 5)(x + 1) \\ {(x + 1)}^{2} (x - 5)$

I HOPE THIS HELP U

PLEASE MARK ME BRAINLIEST