Question

19. Find the product - 3y (xy + y²) and find its value for x = 4 and y = 5.
Simplify each of the following:​

Answer 1

We simply substitute x=4,y=5 in the given product −3y(xy+y 2 ) as follows:−3y(xy+y 2 )

=−(3×5)((4×5)+5 2)

=−15(20+25)

=−15×45

=−675

=−675Hence, −3y(xy+y 2)

=−675 when x=4,y=5.

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