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20-12-2017
Mathematics

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Find the roots of the quadratic equation 3x2 − 12x − 60 = 0

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22-12-2017

3x²-12x-60=0
simplify by dividing by 3: x²-4x-20=0
cannot be factored, use the quadratic formula: √(b²-4ac)=√[(-4)²-4*1*(-20)]=√96=4√6
x=2+2√2 or x=2-2√2

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