Home
Class 10
MATHS
If a and b are the roots of the equation...

If a and b are the roots of the equation `x^2+ax+b=0`,then a+b=

A

1

B

-1

C

2

D

-2

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUADRATIC EQUATIONS

    R G PUBLICATION|Exercise EXERCISE|115 Videos

  • PROBABILITY

    R G PUBLICATION|Exercise EXERCISE|91 Videos

  • REAL NUMBERS

    R G PUBLICATION|Exercise EXERCISE|84 Videos

Similar Questions

Explore conceptually related problems

The roots of the equation ax^2+x+b=0 are equal if

If x=1/3 , -1 are the roots of the equation ax^2+bx-1=0 ,find a and b.

The roots of the equation x+2y=4 and 2x-y=0 are

The roots of the equation x+2y=4 and 2y-x=0 are

If x=11,7 are the roots of the equation ax^2+bx+77=0 ,find the value of a,b.

If x= -5 , -7 are the roots of the equation ax^2+bx+35=0 ,find the value of a,b.

If alpha , beta be the roots of the equation ax^2 + bx + c = 0 , form the quadratic equation whose roots are 1/alpha , 1/beta

If one root of the equation x^2 +px+ 12 = 0 be 4 and if the roots of the equation x^2 + px + q = 0 be equal, find q

Find the value of a and b for which x=2,3 are the roots of the equation 3x^2+2ax+2b=0

If p be the ratio of roots of the equation ax^2 + bx + c = 0 , show that (p + 1)^2/p=b^2/(ac) .

R G PUBLICATION-QUADRATIC EQUATIONS-EXERCISE
  1. The quadratic equation is a)x(x+1)+8=(x+2)(x-2) b)x^2+1/x^2=5 c)x^2...

    Text Solution

    |

  2. The roots of the quadratic equation x^2+6x+5=0 a)5,-1 b)2,3 c)6,-1 ...

    Text Solution

    |

  3. If ax^2+bx+c=0has equal roots,then,c= a)b/(2a) b)-b/(2a) c)b^2/(4a) d...

    Text Solution

    |

  4. If x^2-4x+p=0has real roots then

    Text Solution

    |

  5. The roots of the equation x^2-sqrt3x-x+sqrt3=0 are

    Text Solution

    |

  6. The roots of the equation ax^2+x+b=0 are equal if

    Text Solution

    |

  7. If x=1 is a common root of equations ax^2+ax+3=0 and x^2+x+b=0then ab=

    Text Solution

    |

  8. The equation ax^2+2x+a=0 has two distinct roots,if

    Text Solution

    |

  9. If x^2+2(k+2)x+9k=0 has equal roots then k= a)-1,4 b)1,-4 c)-1,-4 ...

    Text Solution

    |

  10. If 8 is a root of the equation x^2-10x+k=0then the value of k is a)1...

    Text Solution

    |

  11. If a and b are the roots of the equation x^2+ax+b=0,then a+b=

    Text Solution

    |

  12. If one root of the equation x^2+ax+3=0 is 1,then its other root is ...

    Text Solution

    |

  13. The positive value of k for which the equation x^2+kx+64=0 and x^2-8x+...

    Text Solution

    |

  14. The roots of the equation sqrt2x^2+5x+2sqrt2=0 are a)Rational b)Irr...

    Text Solution

    |

  15. The value Of sqrt(6+sqrt(6+sqrt(6+.....))) is a)-2 b)3.5 c)3 d)4

    Text Solution

    |

  16. For the quadratic equation x^2-2x+1=0 the value of x+1/x is a)1 b)-...

    Text Solution

    |

  17. If the equation (a^2+b^2)x^2-2(ac+bd)x+(c^2+d^2)=0 has equal roots, th...

    Text Solution

    |

  18. If (a^2+b^2)x^2+2(ac+bd)x+(c^2+d^2)=0 has no real roots then

    Text Solution

    |

  19. The roots of the equation ax^2+bx+c=0will be reciprocal of each other ...

    Text Solution

    |

  20. The roots of the equation ax^2+bx+c=0 will be equal in magnitute but o...

    Text Solution

    |