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If one root of x 2 +ax+8=0is 4 and the equation x 2 +ax+b=0 has equal roots, then the value of b=

If one root of x2+ax+8=0is 4 and the equation x2+ax+b=0 has equal roots, then the value of b=

Grade:9

1 Answers

Deepak Kumar Shringi
askIITians Faculty 4404 Points
5 years ago
as one root of first equation is 4 so putx=4 in first eqaution you will get
a=-6 now as equation (II) as equal roots D=0 so a2-4b=0 put a=-6 so b=9

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