Class X

Simplify 5⁄2 ÷ 1⁄x
  1. 5x ⁄ 2
  2. 5 ⁄ 2x
  3. 2 ⁄ 5x
  4. 2x ⁄ 5
Expand and simplfy (x - y)(x + y)
  1. x² - 2xy + y2
  2. x² + 2xy + y2
  3. x² - y²
  4. x² + y²
Expand and simplify (x + y)3
  1. x³ + 3xy(x - y) + y³
  2. x³ + 3xy(x + y) + y³
  3. x³ + y³
  4. x³ - y³
Factorise -20x2 - 9x + 20
  1. (5 + 4x)(4 - 5x)
  2. (5 - 4x)(4 - 5x)
  3. (5 - 4x)(4 + 5x)
  4. (5 + 4x)(4 + 5x)
 Expand and simplfy (x - 5)(x + 4)
  1. x² + 9x - 20
  2. x² - x - 9
  3. x² - x - 1
  4. x² - x - 20
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