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The denominator is 4a² - b². This is a difference of squares, which factors as (2a)² - b² = (2a - b)(2a + b).

Mathematics

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Answer

a−2b2a−b\frac{a - 2b}{2a - b}

Step-by-step solution

2 steps
  1. Factor the denominator.

    The denominator is 4a2−b24a^2 - b^2. This is a difference of squares, which factors as (2a)2−b2=(2a−b)(2a+b)(2a)^2 - b^2 = (2a - b)(2a + b).

  2. Simplify the expression.

    Substitute the factored forms of the numerator and denominator back into the expression:

    2a2−3ab−2b24a2−b2=(2a+b)(a−2b)(2a−b)(2a+b)\frac{2a^2 - 3ab - 2b^2}{4a^2 - b^2} = \frac{(2a + b)(a - 2b)}{(2a - b)(2a + b)}

    Cancel out the common factor (2a+b)(2a + b):

    a−2b2a−b\frac{a - 2b}{2a - b}
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