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OpenStudy (anonymous):
Solve the equation x2 = 81 by finding square root this question is looking for two answers.
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OpenStudy (anonymous):
ok when you square root something there is always two answers, do you know why?
OpenStudy (anonymous):
say I am looking at the square root of 16, that is obviously 4 right?
OpenStudy (anonymous):
Yeah
OpenStudy (anonymous):
so then could you also do the square root of 4?
OpenStudy (anonymous):
ok but it could also be -4 do you see what i'm saying?
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OpenStudy (anonymous):
Ohhhhhh yeah okay
OpenStudy (anonymous):
so this would be positive 9 and negative 9
OpenStudy (anonymous):
Oh okay thank you!
OpenStudy (anonymous):
no problem glad to help
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