Multiple Choice

A site supervisor is using the Square Root Property procedure to solve the equation 5m2=805m^2 = 80 for the side length of a square foundation. After finding the solution m=−4m = -4, the supervisor performs the final step: checking the solution. According to the procedure, which of the following expressions correctly represents the substitution used to verify that m=−4m = -4 is a correct solution?

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Updated 2026-09-17

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