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Computing the roots of the equation

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Please tell me how to find the answer to this 

x2 + 2x + 3 =8 is the given equation then find the value of a+b -ab where a and b are roots of the equation.

Reference no: EM131054014

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Computing the roots of the equation : x2 + 2x + 3 =8 is the given equation then find the value of a+b -ab where a and b are roots of the equation.
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