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If the roots of the quadratic equation x...

If the roots of the quadratic equation `x^2 +px + q = 0` are `tan 30^@` and `tan 15^@` respectively then the value of `2+q-p` is

A

3

B

0

C

1

D

2

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The correct Answer is:
A
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MOTION-QUADRATIC EQUATION-EXERCISE -1 (OBJECTIVE PROBLEMS)
  1. If the roots of the quadratic equation x^2 +px + q = 0 are tan 30^@ an...

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  2. The roots of the equation (b-c) x^2 + (c-a)x+ (a-b) = 0

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  3. If (1-p) is a root of quadratic equation x^2+p x+(1-p)=0, then find it...

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  5. Roots of 3^(x)+3^(-x)=10/3 are

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  6. If the roots of the equation x^(2)+2ax+b=0 are real and distinct and t...

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  7. If alpha, beta are roots of the equation ax^2 + bx + c = 0 then the...

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  8. The value of ' a ' for which the sum of the squares of the roots of th...

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  12. Let a, b and c be real numbers such that 4a + 2b + c = 0 and ab gt 0. ...

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  13. The expression y = ax^2+ bx + c has always the same sign as of a if

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  14. If a ,b in R ,a!=0 and the quadratic equation a x^2-b x+1=0 has imagi...

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  15. If both roots of the quadratic equation (2-x) (x + 1) = p are distin...

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  16. If the equations k(6x^2+3)+rx+2x^2-1=0 and 6k(2x^2+1)+px+4x^2-2=0 have...

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  17. If the quadratic equations 3x^2 + ax + 1 = 0 and 2x^2 + bx + 1 = 0 h...

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  18. The equations x^2 +5x^2 +px +q=0 and x^3+ 7xa+ px+ r =0have two roots ...

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  19. If alpha,beta,gamma,delta are the roots of the equation x^4-K x^3K x^2...

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  20. If the roots of the equation x^(3)+Px^(2)+Qx-19=0 are each one more th...

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