1-g²-2gh-h² = 1-(g²+2gh+h²) = 1-(g+h)² = 1²-(g+h)² = (1-(g+h))*(1+(g+h)) = (1-g-h)(1+g+h)
ответ: №3 .
1-g²-2gh-h² = 1-(g²+2gh+h²) = 1-(g+h)² = 1²-(g+h)² = (1-(g+h))*(1+(g+h)) = (1-g-h)(1+g+h)
ответ: №3 .