Please can someone help; this is not cheating btw.

By determining the area of the square, we get

Step-by-step explanation:

Step 1:

The area of a square is given by squaring its side length.

The given squares side length is cm.

The area of a square Here a is the side length.

The area of the square is given as 7 cm².

Step 2:

Substituting the value of a in the equation, we get

Taking the x values on one side and the constants on the other side, we get

So

So it has been proved.