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The equation whose roots are the art...

The equation whose roots are the arthmatic mean and twice the H.M between the roots of the equation `x^2 + ax -b=0` is

A

` 2ax^2 +(a^2-8b) x+ 4ab =0`

B

` 2ax^2 +(a^2 -8b)x-4ab =0`

C

` 2ax^2 +(a^2+8b ) x- 4ab =0`

D

none

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1A (QUADRATIC EQUATIONS)
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  2. Let two numbers have arthmetic mean 9 geometric mean 4. then...

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  3. The equation whose roots are the arthmatic mean and twice the ...

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  4. IF alpha, beta are the roots of 9x^2+6x+1=0 then the equation ...

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  5. The equation whose roots are greater by 1 than those of 2x ^2-3x ...

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  6. IF alpha , beta are the roots of ax^2 + bx +c=0 then the equat...

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  7. The equation whose roots are smaller by 1 then those of 2x ^2-5...

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  8. the equation formed by decreasing each root of ax ^2 +bx+C=0 by...

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  9. If alpha , beta are the roots of a ^2 x + bx +c=0 and alpha + ...

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  10. IF alpha , beta are the roots of x^2+bx +c=0 and alpha + h, b...

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  11. IF alpha and beta are the roots of the equation ax ^2+bx +C=...

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  12. The equation whose roots are numerically equal but opposite in ...

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  13. The equation whose roots are multipled by 3 of those of 2x ^2 ...

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  14. The condition that one root of ax ^2+bx +c=0 may be n times th...

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  15. The condition that one root of ax ^2 + bx +c=0 may be the dou...

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  16. If one root of x^2+kx +12 =0 may be the triple the other , then...

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  17. IF one root ofpx^2-14 x + 8 =0 is six times the other then p=

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  18. IF the roots of ax^2+cx+c=0 are in the ratio p:q then sqrt([(p)/(q...

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  19. IF one root of x^2-x-k=0 is square that of the other, then k=………

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  20. If one root of x^2+px+1=0 is square that of the other thenp=

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