Question 249139
3x^2 - 18x – 48
3*-48=-144
-24 & 6 are factors of -144 whose sum is -18.
3x^2+6x-24x-48
=3x(x+2)-24(x+2) Factoring by grouping.
=(3x-24)(x+2)
=3(x-8)(x+2)
.
Ed