Q. Simplify the following expression completely.x2−7x+6x2−x−30Answer:
Factor Numerator: First, we need to factor both the numerator and the denominator of the expression.Let's start with the numerator: x2−x−30.We are looking for two numbers that multiply to −30 and add up to −1 (the coefficient of x).The numbers −6 and 5 satisfy these conditions because −6×5=−30 and −6+5=−1.So we can factor the numerator as (x−6)(x+5).
Factor Denominator: Now, let's factor the denominator: x2−7x+6. We are looking for two numbers that multiply to 6 and add up to −7. The numbers −6 and −1 satisfy these conditions because −6×−1=6 and −6−1=−7. So we can factor the denominator as (x−6)(x−1).
Cancel Common Factor: With both the numerator and denominator factored, the expression is now: (x−6)(x−1)(x−6)(x+5). We can see that (x−6) is a common factor in both the numerator and the denominator.
Simplify Expression: We can cancel out the common factor (x−6) from both the numerator and the denominator.This leaves us with (x+5)/(x−1).
Final Simplified Form: The expression (x+5)/(x−1) is already in its simplest form.There are no common factors left to cancel, and both the numerator and the denominator are in their simplest form.
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