Задание

Найдите верную группировку одночленов и разложите на множители:

\(\displaystyle -9g^{\,6}-\color{blue}{21g^{\,4}}-\color{red}{9g^{\,10}}-21g^{\,8}+\color{red}{12g^{\,2}}+28=\)

\(\displaystyle =(-\color{red}{9g^{\,10}}\)[?|+|-][ ]\(\displaystyle +\color{red}{12g^{\,2}})+(\)[?||-][ ]\(\displaystyle -\color{blue}{21g^{\,4}}\)[?|+|-][ ]\(\displaystyle )=\)

\(\displaystyle =\big(\)[ ]\(\displaystyle \big)\big(\)[ ]\(\displaystyle \big)\)