Question

This is algebra 1 btw. Please help, thank you :)

Answer 1

Given:-

The sides of the rectangle are 5 and 9.

To find the area after each side is increased by x.

So after each side is increased by x. we get the side lengths as,

$(2x+5),(2x+9)$

So now we use the formula,

$\begin{gathered} A=l\times b \\ A=(2x+5)(2x+9) \\ A=4x^2+18x+10x+45 \\ A=4x^2+28x+45 \end{gathered}$

So our required area is,

$4x^2+28x+45$