Question

One of the factor of x°2-x-12 is
1 ) x-4
2) x + 4
3) x-3
4 ) x+2​

Answer 1

Step-by-step explanation:

${x}^{2} - x - 12 \\ = {x}^{2} - (4 - 3)x - 12 \\ = {x}^{2} - 4x + 3x - 12 \\ = x(x - 4) + 3(x - 4) \\ = (x - 4)(x + 3) \\ so \: (1) \: option \: is \: riight$