s2 + 9s - 36
please solve this its urgent
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s^2 + 9s -36 = 0
s^2 + 12s -3s -36 = 0
s(s+12) -3(s+12) =0
(s-3)(s+12)=0
s=3 or s=-12
s^2 + 12s -3s -36 = 0
s(s+12) -3(s+12) =0
(s-3)(s+12)=0
s=3 or s=-12
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