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Question

Evaluate: (4n22+3n)(10n+n3)

A
4n5+3n4+38n330n220n
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B
4n5+3n4+38n3+30n220n
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C
n5+3n4+38n3+30n220n
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D
4n5+3n4+38n3+30n220
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Solution

The correct option is B 4n5+3n4+38n3+30n220n
(4n22+3n)(10n+n3)
Multiply the coefficients and add the exponents of the variable.
= 4n2.10n+4n2.n32.10n2.n3+3n.10n+3n.n3
= 40n3+4n520n2n3+30n2+3n4
= 4n5+3n4+38n3+30n220n

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