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OpenStudy (anonymous):
What is the solution of n² – 49 = 0?
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OpenStudy (campbell_st):
this is the difference of 2 squares \[n^2 - 49 = (n - 7)(n + 7) = 0\] now solve the binomials.
OpenStudy (anonymous):
n=7,-7
OpenStudy (campbell_st):
correct
OpenStudy (anonymous):
ok
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