21.7 Factor theorem

Factor theorem

Factoring theorem is usually used to factor and find the roots of polynomials. A root or zero is where the polynomial is equal to zero. Therefore, the theorem simply states that when f(k) = 0, then (x – k) is a factor of f(x).


    • a)
      (x2)\left( {x - 2} \right)
    • b)
      (x1)\left( {x - 1} \right)
    • c)
      (x+1)\left( {x + 1} \right)
    • d)
      (3x+5)\left( {3x + 5} \right)
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Factor theorem

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