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

1.	Find the product -3y (xy+y2) and evaluate its value for x = 4 and y = 5
Answer» Let us we solve, = -3y (xy+y²) = (-3y × xy) + (-3y × y²) = -3xy² – 3y³ Now let us evaluate the expression when x = 4 and y = 5 = -3xy² – 3y³ = -3 × (4) × (5)² – 3 × (5)³ = -300 – 375 = -675

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

Answer»

Let us we solve,

= -3y (xy+y²)

= (-3y × xy) + (-3y × y²)

= -3xy² – 3y³

Now let us evaluate the expression when x = 4 and y = 5

= -3xy² – 3y³

= -3 × (4) × (5)² – 3 × (5)³

= -300 – 375

= -675

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