Question

3x^2-x-4 how to split the middle term

Answer 1

3x²-x-4
=3x²-4x+3x-4
=x(3x-4)+1(3x-4)
=(3x-4)(x+1)

Answer 2

3x²-x-4
3x² + 3x - 4x - 4
3x(x+1) - 4(x+1)
(x+1)(3x-4)