The problem says to perform the operation and write the result in stand form.
(sqrt-75)^2
Please show work so I can understand. Thank you.
(sqrt-75)^2
Please show work so I can understand. Thank you.
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Is that a negative sign????
If you take the square root of 75 and then square it, you are essentially reversing the operation of taking the square root, leaving you with an answer of 75.
Now, if that is a negative sign, then you have the sqaure root of 75 times "i", all squared.
This comes out to be about (8.7i)^2
Now, 8.7 squared is 75, and according to mathematics, i^2 always equals -1.
The answer would therefore be -75.
So your answer is the original number within the square root in the problem, either 75 or -75 depending.
If you take the square root of 75 and then square it, you are essentially reversing the operation of taking the square root, leaving you with an answer of 75.
Now, if that is a negative sign, then you have the sqaure root of 75 times "i", all squared.
This comes out to be about (8.7i)^2
Now, 8.7 squared is 75, and according to mathematics, i^2 always equals -1.
The answer would therefore be -75.
So your answer is the original number within the square root in the problem, either 75 or -75 depending.
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Is the answer not equal to 75 ? The square root of any number squared is equal to the number you started out with. Hope this helps. If not try this.
http://www.wolframalpha.com/
http://www.wolframalpha.com/