Question

Two x square minus x minus twenty one equals zero. Solve by factorisation

Answer 1

Answer:

2x²-x+21

2x²-7x+6x+21

2x²+6x-7x+21

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

so x= -3 or x=7/2

Answer 2

Answer:

(2x-7)(x+3)

OR X=7/2 OR X=-3

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