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

1.	Find the product -3y (xy+y2) and find its value for x = 4 and y = 5
Answer» -3y (xy + y²) = -3xy² – 3y³ According to question: When x = 4 and y = 5 = - 3xy² – 3y³ = - 3 (4) (5)² – 3 (5)³ = - 300 – 375 = - 675

Answer»

-3y (xy + y²)

= -3xy² – 3y³

According to question:

When x = 4 and y = 5

= - 3xy² – 3y³

= - 3 (4) (5)² – 3 (5)³

= - 300 – 375

= - 675

Discussion