Find the roots of the equation (rational equation, roots, domain, excluded values)
Answer: The roots of the equation are and .
Step-by-step solution
Step 1: Combine fractions
To solve this rational equation, we first combine the fractions on the left side by finding a common denominator. The common denominator for and is . We then add the numerators after adjusting them for the common denominator.
Step 2: Simplify and cross-multiply
Next, we simplify the numerator on the left side. Then, we multiply both sides of the equation by the common denominator to eliminate the fractions, which is also known as cross-multiplication.
Step 3: Expand and rearrange into standard quadratic form
We expand the right side of the equation by multiplying the terms. After expanding, we combine like terms and rearrange the equation into the standard quadratic form .
Step 4: Apply the quadratic formula
Since the quadratic equation cannot be easily factored, we use the quadratic formula to find the roots. Here, , , and .
Step 5: Substitute values and solve for x
Substitute the values of , , and into the quadratic formula and simplify. We calculate the discriminant, , which simplifies to . Finally, we divide all terms by 2 to get the simplified roots.
Step 6: Check for excluded values
The problem states that (which is 1.5) and . Both calculated roots, approximately and , are not equal to the excluded values. Therefore, both are valid roots.
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