Factorize 2x2 - x - 15
Solution
= 2x2 - x – 15. We split the middle term (-x)
to be (-6x + 5x).
= 2x2 - 6x + 5x – 15
(-x)
= -6x + 5x.
= (2x2 -6x) + (5x - 15)
= 2x(x - 3) + 5(x - 3)
= (2x + 5) (x -3)
Hence 2x2 - x – 20 = (2x + 5) (x - 4) answer.
TRY
THIS…..
Factorize 3x2 - 8x – 35.
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