Question

find the product -3y(xy+y2)and find its value for x=4and y=5

Answer 1

-15(20+10)
= -15*30
= -450 is the answer for this equation where x=4 and y=5

Answer 2

x=4
y=5
=-3y(xy+y2)
=-15(20+25)
=-15(45)
=-675