Mathematics: What is a really good better buy question

What is a really good better buy question

mohayon2020

09.02.2022

huh? lol

Step-by-step explanation:

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reearamrup27

22.03.2023

k^4+10k^3+21k^2

Step-by-step explanation:

Given

Height of rectangle is h=k^2+3k

Width is w=k^2+7k

The area of the rectangle is given by the multiplication of the height and width

$\Rightarrow A=\left(k^2+3k\right)\left(k^2+7k\right)\\\\\Rightarrow A=k^2k^2+k^2\cdot \:7k+3kk^2+3k\cdot \:7k\\\\\Rightarrow A=k^4+10k^3+21k^2$

Thus, the area of the rectangle is k^4+10k^3+21k^2 .

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