sqrt(x3 + x2) = x*sqrt(x+1) and that cannot be simplified further.
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It's the square root of a2+b2. It cannot be simplified. It is NOT a+b. The answer is c square.
29.5
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4
It's the square root of the sum 18 feet squared plus 18 feet squared. 18 feet squared is 324 square feet. 2 x 324 square feet = 648 square feet. The square root of 648 square feet is about 25.46 feet.