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if the difference of the roots of the eq...

if the difference of the roots of the equation ` x^(2)+ ax +b=0` is equal to the difference of the roots of the equation ` x^(2) +bx +a =0` ,then

A

a + b =4

B

a = b = - 4

C

a -b = 4

D

a -b = - 4

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The correct Answer is:
B
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AAKASH INSTITUTE-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-Assignment (Section -B) (objective Type Questions ( one option is correct)
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  3. if the difference of the roots of the equation x^(2)+ ax +b=0 is equa...

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  5. If the equations ax^2 + bx + c = 0 and x^2 + x + 1= 0 has one common r...

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  6. If 1,2,3 are the roots of the equation x^(3) + ax^(2) + bx + c=0 , th...

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  7. Consider that f(x) =ax^(2) + bx +c, D = b^(2)-4ac , then which of the...

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  8. If the minimum value ofx^2+2x+3 is m and maximum value of -x^2+4x+6 is...

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  10. If one root of equation (l-m) x^2 + lx + 1 = 0 be double of the other ...

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  11. if p,q,r are real numbers satisfying the condition p + q +r =0 , then ...

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  12. The roots of the equation x^(3) -2x^(2) -x +2 =0 are

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  13. IF alpha , beta are the roots of the equation x^2+2ax +b=0 , the...

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  14. The set of all values of ' a ' for which the quadratic equation 3x^2+2...

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  15. Let a,b,c in R and a ne 0 be such that (a + c)^(2) lt b^(2) ,the...

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  16. If p + iq be one of the roots of the equation x^(3) +ax +b=0 ,then 2...

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  17. If a(1),a(2),a(3),a(4),,……, a(n-1),a(n) " are distinct non-zero real...

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  19. If the sum of the roots of the quadratic equation ax^2 + bx + c = 0 ( ...

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  20. The number of irrational roots of the equation (x-1) (x-2) (3x-2) (...

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