Question

-2Ix² + I6x + 5Factorise the given polynomial.

Answer 1

Answer :

Now,

- 21 x² + 16x + 5

= - 21 x² + ( 21 - 5 )x + 5

= - 21 x² + 21x - 5x + 5

= - 21x ( x - 1 ) - 5 ( x - 1 )

= ( x - 1 ) ( - 21 x - 5 )

= ( 1 - x ) ( 21x + 5 ),

which is the required factorization

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Answer 2

Here we have to spilt the mid term .

Refer to the above attachment :)

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