Question

$frac{ 9a^{2}+ 16a^{2}+16a^{2}-12ac }{12ac}$

Answer 1

$frac{9a^2+16a^2+16a^2-12ac}{12ac}= frac{41a^2-12ac}{12ac}= frac{a(41-12c)}{12ac}= frac{41-12c}{12c}$