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If x^2 - cx +d =0 , x^2-ax +b=0 have ...

If ` x^2 - cx +d =0 , x^2-ax +b=0` have one common root and second has equal roots then ` 2 (b+d)` =

A

a+c

B

a-c

C

ac

D

`a//c`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-QUADRATIC EQUATIONS & EXPRESSIONS-EXERCISE-II
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  2. If every pair from among the equations x^(2)+ax+bc = 0, x^(2)+bx+ ca...

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  3. If x^2 - cx +d =0 , x^2-ax +b=0 have one common root and secon...

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  4. If (x-2) is a common factor of the expressions x^(2)+ax+b and x^(2)+cx...

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  8. If the roots of x^2+x+a=0 exceed , a then

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  9. Out of the two roots of x^(2) + (1 - 2lambda )x + (lambda^(2)-lambda-2...

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  10. IF both the roots of the quadratic equation x^2-2kx+k^2 +k -5=0 a...

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  12. If a, b, c are real if ax^(2)+ bx + c = 0 has two real roots alpha, be...

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  15. The set of values of x which satisfy 5x+2 lt 3x+8 and (x+2)/(x-1) lt 4...

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  16. The values of x for which (x-1)/(3x+4) lt (x-3)/(3x-2)

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  17. The solution set of the inequation 3^x+3^(1-x) -4 lt 0, is

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  18. IF sqrt(9x^2 + 6x +1) lt (2-x) then

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  19. The set of solutions satisfying both x^(2)+5x+6 ge 0 and x^(2)+3x-4 lt...

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  20. {x in R: (14x)/(x+1)- (9x-30)/(x-4) lt 0} =

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