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If one root of x^2+ax +8=0 is 4 an...

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

A

7

B

9

C

1

D

3

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B
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1A (QUADRATIC EQUATIONS)
  1. IF x1 and x2 are the real roots of the equation x^2 - kx +c=...

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  2. If one root of the equation I x ^2 - 2(1+i) x+ (2-i) =0 is 2- I ...

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  3. If one root of x^2+ax +8=0 is 4 and the equation x^2 + ax +b=0...

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  4. IF the roots of the equation x^2-5x +16=0 are alpha , beta an...

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  5. IF x^2-3x +2 is a factor of x ^4 -px^2 +q=0 then (p,q)=0

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  6. IF the product of the roots of 5x^2-4x+2+m(4x^2-2x-1) =0 is 3,...

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  7. IF k gt 0 and the product of the roots of the equation x^2 - 3kx...

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  8. The value of K , so that the sum and product of the roots of ...

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  9. IF the sum of the square of the roots of x ^2+px -3=0 is 10 t...

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  10. alpha , beta are the roots of x^2+kx+2=0 . If alpha - beta =1 ...

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  11. alpha , beta are roots of the equation lamda (x^2-x)+x+5=0 If ...

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  12. The harmonic mean of the roots of the equation ( 5+ sqrt(2)) x^...

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  13. IF C and D are the roots of (x-a) (x-b) -k=0 then the roots of ...

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  14. IF alpha , beta be the roots of the equation (x-a) ( x-b) +c=0 ...

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  15. The equation whose roots are 2 sqrt(3) - 5 and -2 sqrt(3)-5 is

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  16. The equation whose roots are 3+ 2 I , 3- 2i is

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  17. IF alpha and beta are the roots of 2x^2 + x + 3=0 , then the ...

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  18. IF alpha , beta are the roots of x^2 + 5x - 4 =0 then the...

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  19. If alpha, beta are the roots of x^(2) - x + 1 = 0 then the quadratic e...

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  20. IF alpha , beta are the roots of x^2 - ax +b=0 , then the who...

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