Home
Class 8
MATHS
Simplify the following using the formula...

Simplify the following using the formula: `(a-b)(a+b)=a^2-b^2:`
(i) `(79)^2-(69)^2`
(ii) `197\ xx\ 203`

Promotional Banner

Topper's Solved these Questions

  • COMPOUND INTEREST

    RD SHARMA ENGLISH|Exercise All Questions|130 Videos

Similar Questions

Explore conceptually related problems

Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: (i) (82)^2-(18)^2 (ii) (467)^2-(33)^2

Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: 113 xx\ 87 (ii) 95 xx 105

Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: 1. 8 xx 2.2 (ii) 9. 8 xx 10.2

Simplify the following by using (a+b)(a-b)=a^2-b^2dot (i) 68 xx 72 (ii) 101 xx 99 (iii) 67 xx 73 (iv) 128^2-77^2

Write the following in the expanded form: (i) (a+2b+c)^2 (ii) (2a-3b-c)^2

Simplify the following: 3(a^4b^3)^10xx5(a^2b^2)^3

Use the formula : (a+b) (a-b) = a^(2) - b^(2) to evaluate : (ii) 33 xx 27

Simplify the following expressions : 2/3 (2a-b) +1/2 (a-2b+c) - 1/3 c

Use the formula : (a+b) (a-b) = a^(2) - b^(2) to evaluate : (iv) 9.8 xx 10.2

Use the formula : (a+b) (a-b) = a^(2) - b^(2) to evaluate : (iii) 103 xx 97

RD SHARMA ENGLISH-ALGEBRAIC EXPRESSIONS AND IDENTITIES-All Questions
  1. Using the formula for squaring a binomial , evaluate the following:...

    Text Solution

    |

  2. Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: (i)(82...

    Text Solution

    |

  3. Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: (i) (7...

    Text Solution

    |

  4. Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: 113 xx\...

    Text Solution

    |

  5. Simplify the following using the formula: (a-b)(a+b)=a^2-b^2: 1. 8 xx...

    Text Solution

    |

  6. Simplify the following using the identities: (58^2-42^2)/(16) (ii) 1...

    Text Solution

    |

  7. Simplify the following using the identities: (198\ xx\ 198-102\ xx\ 1...

    Text Solution

    |

  8. Find the value of x, if: (i) 4x=(52)^2-(48)^2 (ii) 14 x=(47)^2-(33)...

    Text Solution

    |

  9. If x-1/x=3, find the value of x^2+1/(x^2)dot

    Text Solution

    |

  10. If x-1/x=3,\ find the values of x^2+1/(x^2)a n d\ x^4+1/(x^4)dot

    Text Solution

    |

  11. If x^2+1/(x^2)=18 , find the values of x+1/x and x-1/xdot

    Text Solution

    |

  12. If x+y=4\ a n d\ x y=2, find the values of x^2+y^2

    Text Solution

    |

  13. If x-y=7\ a n d\ x y=9, find the value of x^2+y^2

    Text Solution

    |

  14. If 3x+5y=11\ a n d\ x y=2, find the value of 9x^2+25 y^2

    Text Solution

    |

  15. Find the values of the following expressions: 16 x^2+24+9\ ,\ w h e ...

    Text Solution

    |

  16. If x+1/x=9. find the value of x^4+1/(x^4)dot

    Text Solution

    |

  17. If x+1/x=12 , find the value of x-1/xdot

    Text Solution

    |

  18. If 2x+3y=14\ a n d\ 2x-3y=2, find the value of x y . [Hint use (2x+3y...

    Text Solution

    |

  19. If x^2+y^2=29\ a n d\ x y=2, find the value of (i)x+y (ii) x-y

    Text Solution

    |

  20. What must be added to each of the following expressions to make it ...

    Text Solution

    |