Tuesday 1 July 2014

FACTORIZATION - 1

Factorize 2x2 - x - 15.

Solution

= 2x2 - x – 15.  We split the middle term (-x) to be (-6x + 5x).

= 2x2 - 6x + 5x – 15     (-7x = -6x + 5x).

= (2x2 - 6x) + (5x - 15)

= 2x(x - 3) + 5(x - 3)

= (2x + 5) (x - 3)

Hence 2x2 - x – 15 = (2x + 5) (x - 3) answer.


TRY THIS…..


Factorize 3x2 + x – 14.

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