GR9 Q1-L1

Subdecks (1)

Cards (32)

  • Quadratic equation
    A mathematical sentence of the second degree
  • Identifying a quadratic equation
    1. Arrange into standard form ax^2 + bx + c = 0
    2. a should not be 0
    3. a is a positive real number
  • Parts of a quadratic equation
    • a (quadratic term)
    • b (linear term)
    • c (constant term)
  • Quadratic equations
    • x^2 - 5x + 3 = 0
    • x^2 + 4x + 1 = 0
    • 9x^2 - 25 = 0
    • 1/2x^2 + 3x = 0
    • 7x^2 = 1/3x
    • 6x^2 = 9
    • -8x^2 + x = 6
    • 3x^2 - 6x - 10 = 0
    • 2x^2 + 3x + 1 = 0
    • 3x^2 - x + 5 = 0
  • If a = 0, the equation is no longer quadratic but linear
  • If b = 0, the equation can still be quadratic as long as a and c are not 0
  • If c = 0, the equation can still be quadratic as long as a and b are not 0