11
practice testMultiple Choice

Practice Test

Question 11 • Mathematics III

What is the solution to the equation the fraction with numerator m and denominator m plus 4 plus the fraction with numerator 4 and denominator 4 minus m is equal to the fraction with numerator m squared and denominator m squared minus 16 ?

Answer
A
m is equal to 4
B
m is equal to negative 4
C
m is equal to negative 2
D
m is equal to 2

Explanation

The denominators require m ≠ 4 and m ≠ −4. Using the common denominator (m + 4)(m − 4), the left side becomes [m(m − 4) − 4(m + 4)]/[(m + 4)(m − 4)] = (m² − 8m − 16)/(m² − 16). Equating numerators gives m² − 8m − 16 = m², so m = −2, which is allowed. The solution is m equal to negative 2.

AI-written and checked against the verified answer.

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