Adding and Subtracting Rational Expressions — Quiz
Question 8 • Mathematics III
What is the sum? the fraction with numerator x and denominator x plus 3 plus the fraction with numerator 3 and denominator x plus 3 plus the fraction with numerator 2 and denominator x plus 3
Answer
A
the fraction with numerator x plus 5 and denominator 3 x plus 27
B
the fraction with numerator x plus 5 and denominator x plus 3
C
the fraction with numerator 6 x and denominator x plus 3
D
5 thirds
Explanation
All three fractions have the same denominator, x + 3, so add their numerators: x + 3 + 2 = x + 5. The sum is (x + 5)/(x + 3), which is choice B.
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