2019cwelsh 2019cwelsh

25-07-2017
Mathematics

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What is the product of 4xy and y2 + 2x?

4xy + 4xy 3

8x 2y + 4xy2

8x 2 + 4xy 3

8x 2y + 4xy3

Respuesta :

10-07-2018

[tex]4xy\cdot(y^2+2x)=(4xy)(y^2)+(4xy)(2x)=4xy^{1+2}+(4\cdot2)x^{1+1}y\\\\=4xy^3+8x^2y=8x^2y+4xy^3[/tex]

[tex]\text{Used:}\\\\a^n\cdot a^m=a^{n+m}\\\\a\cdot b=b\cdot a[/tex]

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