Q. Perform the following operation and express in simplest form.x2+4x−5x+5÷x2−19x+9Answer:
Factor Denominators: First, we need to factor the denominators of both fractions to simplify the expression.The denominator of the first fraction is x2+4x−5, which factors into (x+5)(x−1).The denominator of the second fraction is x2−1, which is a difference of squares and factors into (x+1)(x−1).
Rewrite as Multiplication: Next, we will rewrite the division of the two fractions as a multiplication by the reciprocal of the second fraction. (x+5)/(x2+4x−5)÷(9x+9)/(x2−1) becomes (x+5)/((x+5)(x−1))×(x2−1)/(9x+9).
Simplify by Canceling: Now, we can simplify the expression by canceling out common factors.The (x+5) in the numerator of the first fraction cancels with the (x+5) in its denominator.The (x2−1) in the numerator of the second fraction is (x+1)(x−1), and the (9x+9) in its denominator can be factored as 9(x+1).
Final Simplified Expression: After canceling the common factors, we are left with:x−11⋅9(x+1)x−1.The (x−1) in the numerator and denominator cancel each other out.
Final Simplified Expression: After canceling the common factors, we are left with: (x−1)1⋅9(x+1)(x−1).The (x−1) in the numerator and denominator cancel each other out.The final simplified expression is:9(x+1)1.
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