Home
Class 9
MATHS
If x=-2\ a n d\ y=1, by using an identit...

If `x=-2\ a n d\ y=1,` by using an identity find the value:
`(5y + 15/y)(25y^2 -75 + 225/(y^2))`

Promotional Banner

Topper's Solved these Questions

  • AREA OF PARALLELOGRAMS AND TRIANGLES

    RD SHARMA|Exercise All Questions|205 Videos

Similar Questions

Explore conceptually related problems

If x=-2 and y=1, by using an identity find the value: (4y^(2)-9x^(2))(16y^(4)+36x^(2)y^(2)+81x^(4))

If x=1 and y=-2; by using the identity find the following : (i) (4y^2-9x^2)(16y^4+36x^2y^2+81x^4) (ii) (x+2y)(x^2-2xy+4y^2)

If x:y=2:3, find the value of (3x+2y):(2x+5y)

If 2x +3y = 30 and (x+y)/y = 11/8 , then find the value of 5y + 6x

find the value of x^2/y^2+y^2/x^2 , when x/y+y/x=1

If 4x + 3y = 25 and 5x + 2y = 26 , then find the values of x and y

If 2x+3y=34 and (x+y)/(y)=(13)/(8), then find the value of 5y+7x

If x=\ 28^(1/3)\ \ a n d\ y=\ 27^(1/3) find the value of x-y-1/(x^2+x y+y^2)

If x/y = 6/5 , find the value of ( x^2 + y^2 ) / ( x^2 - y^2 )

If 3x+5y=11 and xy=2, find the value of 9x^(2)+25y^(2)

RD SHARMA-ALGEBRAIC IDENTITIES-All Questions
  1. If x=-2\ a n d\ y=1, by using an identity find the value: (4y^2-9x^2)(...

    Text Solution

    |

  2. If x=-2\ a n d\ y=1, by using an identity find the value: (2/x - x/2...

    Text Solution

    |

  3. If x=-2\ a n d\ y=1, by using an identity find the value: (5y + 15/y)...

    Text Solution

    |

  4. Find the product: (x+y+2z)(x^2+y^2+4z^2-x y-2yz-2zx)

    Text Solution

    |

  5. Find the product: (2x-y+3z)(4x^2+y^2+9z^2+2x y+3y z-6x z)

    Text Solution

    |

  6. If a+b+c=6\ a n d\ a b+b c+c a=11 , find the value of a^3 + b^3 + c^3 ...

    Text Solution

    |

  7. Evaluate: 30^3+20^3-50^3

    Text Solution

    |

  8. If a+b+c=15\ a n d\ a^2+b^2+c^2=83 , find the value of a^3+b^3+c^3-3a ...

    Text Solution

    |

  9. Evaluate: 1. 5^3-0. 9^3-0. 6^3

    Text Solution

    |

  10. Without actually calculating the cub: (-12)^3+7^3+5^3

    Text Solution

    |

  11. Without actually calculating the cub: (28)^3+\ (-15)^3+\ (-13)^3

    Text Solution

    |

  12. If x+y+z=1,\ x y+y z+z x=-1\ \ a n d\ x y z=-1, find the value of x^3+...

    Text Solution

    |

  13. Simplify: ((a^2-b^2)^3+(b^2-c^2)^3+(c^2-a^2)^3)/((a-b)^3+(b-c)^3+(c-a...

    Text Solution

    |

  14. Find the product: (3x+2y+2z)\ \ (9x^2+4y^2+\ 4\ z^2-\ 6\ x y-4\ y z-6z...

    Text Solution

    |

  15. Find the product: (4x-3y+2z)\ (16 x^2+9y^2+4z^2+12 x y+6y z-8z x)

    Text Solution

    |

  16. Find the product: (2a-3b-2c)(4\ a^2+\ 9\ b^2+\ 4\ c^2+\ 6\ a b-6\ b c+...

    Text Solution

    |

  17. Find the product: (3x-4y+5z)\ (9x^2+16 y^2+25 z^2+12 x y-15 z x+20 y z...

    Text Solution

    |

  18. If x+y+z=8\ \ a n d\ \ \ x y+y z+z x=20 , find the value of x^3+y^3+z^...

    Text Solution

    |

  19. If a+b+c=9\ \ \ a n d\ \ \ a b+b c+c a=26 , find the value of a^3+b^3+...

    Text Solution

    |

  20. If a+b+c=9 and a^2+b^2+c^2=35 , find the value of a^3+b^3+c^3-3a b c

    Text Solution

    |