Question 11 • Mathematics III
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.
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