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fing the area of the square below

Sagot :

[tex]\begin{gathered} \text{The area of the recatangle is;} \\ x^2\text{ - 5x-36} \end{gathered}[/tex]

Here, we want to find the area of the given rectangle

Mathematically, what we have to do is to find the product of the sides

We have this as;

[tex]\begin{gathered} (x-9)(x+4)\text{ = x(x+4)-9(x+4)} \\ =x^2\text{ + 4x -9x - 36} \\ =x^2\text{ - 5x-36} \end{gathered}[/tex]