Question

I need some help on this

Answer 1

Explanation:

Where the line crosses the x axis is when y equals zero. For this to be true one factor must be equal to zero

y=(x+3)(x-2)(x-5) if the expansion is needed

y=(x+3)(x^2-7x+10)

y=x^3-7x^2+10x+3x^2-21x+30

y=x^3-4x^2-11x+30