Question

Simplify –2x3y × xy 2.

A. –12x4y3

B. –2x3y4

C. –2x4y3

D. –3x4y3

Answer 1

`-2x^3y\cdot xy^2=-2x^(3+1)y^(1+2)=-2x^4y^3`

Used:

`a^n\cdot a^m=a^(n+m)`

Answer: C. –2x^4y^3