Question

vo-fi) 9x4- ( x2 + 2x +)​

Answer 1

Step-by-step explanation:

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

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