CBSE  /  Class 8  /  Maths  /  Factorisation

  • 1. 
    The factorisation 1 + 16x + 64x² is

  • (1 - 8x)²
  • (1 + 8x)²
  • (8 - x)²
  • (8 + x)²

  • 2. 
    The factorisation x² + x + \(\frac{1}{4}\) is

  • (\(\frac{x}{2}\) - 1)²
  • (\(\frac{x}{2}\) + 1)²
  • (x + \(\frac{1}{2}\))²
  • (x - \(\frac{1}{2}\))²

  • 3. 
    The value of 99² is

  • (90)² + 2(90)(9) + (9)²
  • (90)² - 2(90)(9) + (9)²
  • (90)² + (9)²
  • none of these

  • 4. 
    The value of 49² is

  • (50)² - 2(50)(1) + (1)²
  • (50)² + 2 (50) (1) + (1)²
  • (50)² - (1)²
  • (50)² + (1)²

  • 5. 
    The factorisation of (\(\frac{x^2}{y^2}\) -2+\(\frac{y^2}{x^2}\)) x ≠ 0, y ≠ 0 is

  • (\(\frac{x}{y}\)+\(\frac{y}{x}\))²
  • (\(\frac{x}{y}\)-\(\frac{y}{x}\))²
  • (\(\frac{x}{y}\)-1)²
  • (\(\frac{x}{y}\)+1)²

  • 6. 
    The value of \(\frac{0.73×0.73×-0.27×0.27}{0.73-0.27}\) is

  • 1
  • 0
  • 0.73
  • 0.27

  • 7. 
    The factorisation of x² - 9 is

  • (x - 3)²
  • (x + 3)²
  • (x + 3)(x - 3)
  • none of these

  • 8. 
    The factorisation of 36x²y² - 1 is

  • (6xy - 1)(6xy + 1)
  • (6xy - 1)²
  • (6xy + 1)²
  • (6 + xy)²

  • 9. 
    The value of \(\frac{0.564×0.564×-0.436×0.436}{0.564-0.436}\) is

  • 0
  • 1
  • -1
  • none of these

  • 10. 
    The value of (0.68)² - (0.32)² is

  • -1
  • 0
  • 1
  • 0.36
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