Question

factorize 3x^2 - x - 4​

Answer 1

Answer:

3x^2-4x+3x-4=0

3x(x+1)-4(x+1)=0

(3x-4)(x+1)=0

x=4/3, or -1

Answer 2

3x^2 - x - 4

= 3x^2 -(4 - 3)x - 4

= 3x^2 - 4x + 3x - 4

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

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

Thus, (3x-1) and (x+1) are the factors of 3x^2 - x - 4.