How to factor this polynomial: 3x^3 - 6x^2 - 189x?

How to factor this polynomial: 3x^3 - 6x^2 - 189x?


First, factor 3X out of each term. Then you'll have a quadratic to factor.

3x\,(x^2 - 2x - 63)

An open topped box can be created by cutting congruent squares from each of the four corners of apiece of cardboard that has dimensions of 20cm by 30cm and folding up the sides. Determine the dimensions of squares that must be cut to create a box with avolume of 1008cm^3

You should have started another thread. Then, someone will answer.