Question

Factories the following expression 9(a+1)2

- 4(a+1) -13 by splitting the middle term​

Answer 1

Answer:

(9a - 4) (x + a + 1)

Step-by-step explanation:

9(a+1)^2  - 4(a+1) - 13

Let (a+1) be x

9x^2 - 4x - 13

= 9x^2 - 13x + 9x - 13

= x(9x - 13) + 1(9x - 13)

= (9x - 13) (x + 1)

Now replace 'x' with (a + 1) and solve

[9(a + 1) - 13] (x + a + 1)

= (9a + 9 - 13) (x + a + 1)

= (9a - 4) (x + a + 1)