Question

(ii) 9x4 - (x2 + 2x + 1).​

Answer 1

Answer:

9x

4

−(x

2

+2x+1)

Above terms can be written as,

(3x

2

)

2

−(x+1)

2

...[because(a+b)

2

=a

2

+2ab+b

2

]

we know that a

2

−b

2

=(a+b)(a−b)

So (3x

2

+x+1)(3x

2

−x−1)

Answer 2

Answer:

36-(x^2+2x+1)

=6^2-(x+1)^2

=(6+x+1)(6-x-1)

=(7+x)(5-x)..