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x2 + 60x - 300
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by Kimberlyhi at April 26, 2010

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cant factorise, use formulax= (-60 +-√60^2 - 4*-300)/2 = (-60 +-√4800 )/2 = (-60+- 2√1200)/2 = -30 + √1200 or -30-√1200

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Sandesh April 27, 2010