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Multiple Choice
Subtract the following rational expressions and write the difference in simplest form if possible.
A
x2+2x3x+6
B
x+2x+6
C
x2+2xx+6
D
x2+2x3
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Verified step by step guidance
1
Identify the two rational expressions to subtract: \(\frac{3}{x} - \frac{2}{x+2}\).
Find the least common denominator (LCD) of the two fractions. Since the denominators are \(x\) and \(x+2\), the LCD is their product: \(x(x+2)\).
Rewrite each fraction with the LCD as the denominator by multiplying numerator and denominator appropriately: \(\frac{3}{x} = \frac{3(x+2)}{x(x+2)}\) and \(\frac{2}{x+2} = \frac{2x}{x(x+2)}\).
Subtract the numerators over the common denominator: \(\frac{3(x+2) - 2x}{x(x+2)}\).
Simplify the numerator by distributing and combining like terms: \$3x + 6 - 2x = x + 6$, so the expression becomes \(\frac{x + 6}{x(x+2)}\).