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OpenStudy (anonymous):
Solve s^2 + 10s + 21 = 0 Solution is s=
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OpenStudy (saifoo.khan):
s = -3 s = -7
OpenStudy (anonymous):
s^2 + 10s + 21 = 0 s^2+ 7s+3s+21=0 s(s+7) + 2(s+7) = 0 (s+2)(s+7) = 0 either s+2 = 0 or s+7=0 hence s=-2 or s=-7
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