(8xy)(9y2z)

Question

Simplified, Multiplying by a monomial

Answer 1

based on where the 2 is, I'm going to assume you mean

(8xy)(9y²z)  

 

First multiply the numbers and you have 72

x and z are not changing because they are not being multiplied by anywhere else

when you multiply variables with exponents, you add the exponents together so

y is the same as y¹ and you are multiplying that with y² since 2+1 = 3 you have y3

and your answer is 

72xy³z