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Calculate the subtraction in parentheses. Square the value in parentheses. Add the numbers under the radical sign. Solve for d{\displaystyle d}.
By using the order of operations, any calculations in parentheses must be completed first. For example:d=(6−2)2+(4−1)2{\displaystyle d={\sqrt {(6-2)^{2}+(4-1)^{2}}}}d=(4)2+(3)2{\displaystyle d={\sqrt {(4)^{2}+(3)^{2}}}} The order of operations states that exponents should be addressed next. For example:d=(4)2+(3)2{\displaystyle d={\sqrt {(4)^{2}+(3)^{2}}}}d=16+9{\displaystyle d={\sqrt {16+9}}} You do this calculation as if you were working with whole numbers. For example:d=16+9{\displaystyle d={\sqrt {16+9}}}d=25{\displaystyle d={\sqrt {25}}} To reach your final answer, find the square root of the sum under the radical sign.  Since you are finding a square root, you may have to round your answer. Since you are working on a coordinate plane, your answer will be in generic “units,” not in centimeters, meters, or another metric unit. For example:d=25{\displaystyle d={\sqrt {25}}}d=5{\displaystyle d=5} units