Question

4x^{3} +12x^{2}-x-3=0

Answer 1

4x^3+12x^2-x-3=0

Take the GCF of the groups. By groups, I mean the 1st two coefficients and variables.

4x^2(x-3) -1(x+3) =0

Then equal everything to the big 0.

4x^2=0

x+3=0

Then they're one step equations

x= -3, -1, 0