87
Объяснение:
(77³-69³)/(70²-62²) -(77³+41³)/(125²-7²) -1/2=((77-69)(77²+77·69+69²))/((70-62)(70+62)) -((77+41)(77²-77·41+41²))/((125-7)(125+7)) -1/2=(8·(77²+77·69+69²))/(8·132) -(118·(77²-77·41+41²))/(118·132) -1/2=(77²+77·69+69²-77²+77·41-41²)/132 -1/2=(77·(69+41)+(69²-41²))/132 -1/2=(77·(69+41)+(69-41)(69+41))/132 -1/2=((69+41)(77+28))/132 -1/2=(110·105)/132 -1/2=(5·35)/2 -1/2=(175-1)/2=174/2=87
87
Объяснение:
(77³-69³)/(70²-62²) -(77³+41³)/(125²-7²) -1/2=((77-69)(77²+77·69+69²))/((70-62)(70+62)) -((77+41)(77²-77·41+41²))/((125-7)(125+7)) -1/2=(8·(77²+77·69+69²))/(8·132) -(118·(77²-77·41+41²))/(118·132) -1/2=(77²+77·69+69²-77²+77·41-41²)/132 -1/2=(77·(69+41)+(69²-41²))/132 -1/2=(77·(69+41)+(69-41)(69+41))/132 -1/2=((69+41)(77+28))/132 -1/2=(110·105)/132 -1/2=(5·35)/2 -1/2=(175-1)/2=174/2=87