Math
posted by Tyrone .
Maria had a square piece of paper. She cut 3 inches off the length and 4 inches off the width. Now the paper has a surface area of 30 in2. Which equation would you use to find the dimensions of the original piece of paper?
A. x2  7x + 12 = 0
B. x2  7x  18 = 0
c. x2  3x  4 = 30
D. x2 + 3x + 4 = 30
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