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# Is this required? watch

1. On Solomon paper D for C4 on question 3a. On the specification for Algebra and Functions 'Quadratics factors in the denominator such as x² + a where a>0' is not required. Does this go for (x² - 3x) or not?
2. (Original post by Hus_87)
On Solomon paper D for C4 on question 3a. On the specification for Algebra and Functions 'Quadratics factors in the denominator such as x² + a where a>0' is not required. Does this go for (x² - 3x) or not?
x² - 3x = x(x-3)

Partial fractions.
3. (Original post by Hus_87)
On Solomon paper D for C4 on question 3a. On the specification for Algebra and Functions 'Quadratics factors in the denominator such as x² + a where a>0' is not required. Does this go for (x² - 3x) or not?
No, a>0 means when the constant a which is free from the variable x:
e.g x² + 4, a = 4, is not required

In your example x² - 3x, there is no a, (a=0) hence you should factorise this to x(x-3)

x² + 4 can not be factorised hence this is true when a is a positive integer and the function is a quadratic.
4. Thanks for clearing it up guys

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