4x² + x - 18 factorise by splitting the middle term
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Answer:
(4x+9) (x+2)
Step-by-step explanation:
4x² + x -18
sum = 1
product = -72
= 4x² - 8x + 9x - 18
= 4x ( x - 2 ) + 9 ( x - 2 )
= (4x + 9 ) ( x - 2 )
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