Question

I need help with this question . Also I need help with x-2 times x

Answer 1

3(x-2)(4x+5)(x-1)=

(12x²+15x-24x-30)(x-1)=

(12x²-9x-30)(x-1)=

12x^3-12x²-9x²+9x-30x+30= 12x^3-21x²-21x+30