Question

factorise x^3+8x^2-7x-2​

Answer 1

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant 1 • -7 = -7

Step-2 : Find two factors of -7 whose sum equals the coefficient of the middle term, which is -8 .

-7 + 1 = -6

-1 + 7 = 6

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

Final result :

x • (x2 - 8x - 7)

Answer 2

Answer:

x (x-1) (x+9)

Step-by-step explanation:

First take common factors out.

=x(x^2+8x-7-2)

=x(x^2+8x-9)

Then find the factors of (x^2+8x-9)

= x^2-1x+9x-9

=x(x-1) +9(x-1)

= (x-1) (x+9)

Substitute this answer

=x (x-1) (x+9)