chicagochica5
Solve the equation using square roots.
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chicagochica5
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miicchi
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x^2 - 9 = 0 --> x^2 = 9
x = ±√9 --> x = ±3
febylailani
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\[x ^{2} = 9\] so , can u find the result by yourself? ;)
chicagochica5
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I dont know how to find the answer @febylailani, @miicchi
miicchi
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i just showed you. [: i wrote x squared as x^2.
x^2 -9 = 0 --> add 9 on both sides so that it becomes x^2 = 9.
to check the answer i gave, just solve 3^2, or 3 * 3, and you'll get 9. so the answer is ±3.
or do you have to graph it as well?
febylailani
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@miicchi found the answer. every square root has two answer.
\[x ^{2} = 9\]
\[x = \sqrt{9}\]
x = \[\pm 3\]
x = 3 or x = -3
got it?
chicagochica5
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A. –3, 3
B. –9, 9
D. no real number solutions
C. \[-\sqrt{3}, \sqrt{3}\]
chicagochica5
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@miicchi, @febylailani , So the answer would be A?
miicchi
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yes [:
chicagochica5
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Thank you @miicchi and @febylailani
febylailani
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yup :)
febylailani
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uwc :)