Polynomial Class 9 Maths Notes | StudyTution

  • Degree of a polynomial
  • Coefficients
  •  Monomials, Binomials etc.
  • Constant, Linear, Quadratic Polynomials etc.
  • Value of a polynomial for a given value of the variable
  • Zeroes of a polynomial
  • Remainder theorem
  • Factor theorem
  • Factorisation of a quadratic polynomial by splitting the middle term
  • Factorisation of algebraic expressions by using the Factor theorem
  • Algebraic identities –
  1. (x + y) 2 = x2 + 2xy + y2
  2. (x – y)2 = x2 – 2xy + y2
  3. x2 – y2 = (x + y) (x – y)
  4. (x + a) (x + b) = x2 + (a + b) x + ab
  5. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx
  6. (x + y)3 = x3 + 3×2 y + 3xy2 + y3 = x3 + y3 + 3xy (x + y)
  7. (x – y)3 = x3 – 3×2 y + 3xy2 – y3 = x3 – y3 – 3xy (x – y)
  8. x3 + y3 = (x + y) (x2 – xy + y2 ) x3 – y3 = (x – y) (x2 + xy + y2 )
  9. x3 + y3  + z3 – 3xyz = (x + y + z) (x2+ y2  + z2– xy – yz – zx)
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