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a value of b for which the eq.
x^2 + bx -1=0
x^2 +x +b =0
have one common root
hi taru
Let the two quadratic equations be ax² + bx + c =0 and a1x² + b1x + c1 =0 .
then the condition that one of the root is common
(bc1-b1c)(ab1- a1b) = (ca1-ac1) 2
compare with the given equations find the value of a , a1 , b , b1 , c , c1
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