What equations have m=5

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work