Find Principal Square Root: To find the negative square root of a number, we need to find the principal (positive) square root and then take its negative value.
Calculate Negative Square Root: The principal square root of 100 is found by determining which number, when multiplied by itself, gives the product 100.10×10=100, so 100=10.
Final Result: Since we are looking for the negative square root, we take the negative of the principal square root we found in the previous step.The negative square root of 100 is −10.