Q.6 If the two equations x2 - cx + ...
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Q.6 If the two equations x2 - cx + d = 0 and two equations x2 - 6x + d = 0) and x2 _ ax + b =0 have one common root and the second has equal roots, then 2(b + d) =

JEE/Engineering Exams
Maths
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( x^{2}-a x+b=0 ) [ 2 alpha=a quad alpha=frac{a}{2} quad alpha ] [ begin{array}{l} alpha^{2}-alpha x a+d=0 b-frac{a b}{2}+d=0 quad 2(b+d)=a c end{array} ]
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