Question

If y^4-y^3-3 is multiplied by 2y^3-2, what is the coefficient of y^3 in the product?

A. -4
B. -2
C. -1
D. 1
E. 6

Answer 1

-4

Explanation:

`(y^4-y^3-3) * (2y^3-2)=...+[(-1)(-2)+(2)(-3)]y^3+...\\=...+[2-6]y^3+...\\=...+(-4)y^3+...\\`

so coefficient of y^3=-4