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OpenStudy (anonymous):
What is the solution of n² – 49 = 0? –7 7 ±7 There is no solution.
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OpenStudy (hoblos):
n² – 49 =0 (n-7)(n+7)=0 n=±7
hero (hero):
n² - 49 = 0 n² = 49 n = ± 7
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