Factor Denominator: Factor the denominator of the first fraction.The denominator is a difference of squares, which can be factored as follows:9x2−16=(3x)2−42=(3x+4)(3x−4)
Rewrite First Fraction: Rewrite the first fraction with the factored denominator.(3x)/(9x2−16) becomes (3x)/((3x+4)(3x−4))
Find Common Denominator: Find a common denominator for the two fractions.The common denominator will be the product of (3x+4) and (3x−4).
Rewrite with Common Denominator: Rewrite both fractions with the common denominator.(3x)/((3x+4)(3x−4))−(1)/(3x+4) becomes (3x)/((3x+4)(3x−4))−(3x−4)/((3x+4)(3x−4))
Combine Fractions: Combine the fractions.Now that they have a common denominator, we can combine the numerators:(3x−(3x−4))/((3x+4)(3x−4))
Simplify Numerator: Simplify the numerator.Distribute the negative sign in the second term of the numerator:3x−3x+4=4
Write Simplified Expression: Write the simplified expression.The simplified form of the expression is:(3x+4)(3x−4)4
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