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OpenStudy (samigupta8):
show that if the roots of the equation (a^2+b^2)x^2 +2x(ac+bd) +c^2+d^2=0 are real they will be equal
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OpenStudy (anonymous):
honesty, I'm not sure. Sorry.
OpenStudy (anonymous):
u must show that discriminant of quadratic is always smaller than or equal to zero
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