Автор - hand66666666

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Ответ

Автор - ZLOYTIGROVSKIY

1) frac{12ab}{4a}  = 3y \  \ 2) frac{3c(1 - c)}{9c {}^{2}(c - 1) }  =  frac{ - ( c - 1)}{3c times (c - 1)}  =  -  frac{1}{3c}  \  \ 3) frac{12x - 3x {}^{3} }{6x + 6}  =  frac{3 times (4x - x {}^{3}) }{3 times (2x  + 2)}  =  frac{4x - x {}^{3} }{2x + 2}  \  \ 4) frac{m {}^{2} - 4 }{m {}^{2}  + 4m + 4}   =  frac{(m - 2) times (m + 2)}{(m + 2) {}^{2} }  =  frac{m - 2}{m + 2}  \  \ 5) frac{y - 3}{y {}^{2} - 6y + 9 }  =  frac{y - 3}{(y - 3) {}^{2} }  =  frac{1}{y - 3}

~•~•~•ZLOY_TIGROVSKIY~•~•~•

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