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Algebraic Fractions

Algebraic Fractions. The method of adding or subtracting fractions is the same regardless of whether they contain numbers or algebraic terms. We first need to find the lowest common denominator. (L.C.D.). i.e. what number can be divided by 5 and 7?.

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Algebraic Fractions

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  1. Algebraic Fractions The method of adding or subtracting fractions is the same regardless of whether they contain numbers or algebraic terms. We first need to find the lowest common denominator. (L.C.D.) i.e. what number can be divided by 5 and 7? The reason we do this is to find two equivalent fractions with the same denominator The L.C.D. is 35.

  2. Here the L.C.D. is 2a

  3. Here the L.C.D. is 3a

  4. Here the L.C.D. is 15

  5. Here the L.C.D. is 15 Watch your NEGATIVES!!! Page 327 Questions 2 and 3

  6. Complex Algebraic Fractions Here the L.C.D. is x(x-2)

  7. Here the L.C.D. is not so obvious. We have to factorise the first denominator.

  8. Page 328 Exercise 7.

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