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no. 21
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Verified answer
The product of [(x+2y)] and [9(x^2)(y)]
[9(x^2)(y)][(x+2y)]
9(x^3)(y)+ 18((xy)^2)
at x= 1/2 and y=3
=9(1/8)(3)+18(9/4)
=27/8+162/4
=(27+328)/8
=355/8
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Answer:
9/2x^3y+9x^2y^2......
for x=1/2and y=3 =351/16