i don't know how to work any of this...
Greg drew 3 squares with each side equal to z units. For each square, he does something different to it according to each part below:
Part A: Greg increased the length and width of the square by t units each. What will be the change in the area of the original figure? Show your work. (4 points)
Part B: Greg decreased the length and width of the square by t units each. What will be the change in the area of the square? Show your work. (3 points)
Part C: Greg increased the length of the square by t units and decreased its width by t units. What will b

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you can just assign the letters numbers if you need a more concrete idea of what's happening

This may be useful http://openstudy.com/study#/updates/5317c8efe4b0572ef0fc2d44

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