Question

2x²-x-21 factorise............................,
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Answer 1

Answer:

2x^2 -x -21

2x^2 +6x -7x -21

2x(x+3) -7(x+3)

(2x-7)(x+3)

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Answer 2

Step-by-step explanation:

2x² - x - 21

2x² - 7x + 6x - 21

x ( 2x - 7 ) + 3 ( 2x - 7 )

( 2x - 7 ) ( x + 3 )