Kenneth S. answered • 10/02/17

Let's cut to the chase: I know this subject & how to teach YOU

You DO NOT need those asterisks to indicate multiplication.

Side-by-side numbers simply need to be enclosed in parentheses, for multiplication.

**(-3x**x

^{2}y^{3})(4xy^{2}) = -12^{3}y

^{5 }using the product of both coefficients, and using addition of exponents for the respective x and y factors...just as Properties of Exponents are expounded in your textbook.

Learn from this to avoid heartache throughout all math courses.