factorise 3 x square minus x minus 4
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Answered by
386
3x*x -x-4
3x*x+3x-4x-4
3x(x+1)-4(x+1)
(3x-4)(x+1)
3x*x+3x-4x-4
3x(x+1)-4(x+1)
(3x-4)(x+1)
Answered by
334
Answer:
3x²-x-4 = (x+1)(3x-4)
Step-by-step explanation:
Factorisation of Quadratic expression :
3x²-x-4
Splitting the middle term, we get
= 3x² + 3x - 4x - 4
= 3x(x+1)-4(x+1)
= (x+1)(3x-4)
Therefore,
3x²-x-4 = (x+1)(3x-4)
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