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Use coefficients with their signs - Paper 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Solve 2x^2+(-6)x+(4)=0 using x=(-b +/- sqrt(b^2-4ac))/(2a). Coefficients retain their signs. Work over the reals; a is non-zero. The discriminant distinguishes two, one repeated or no real roots.
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