Question

Вычеслите 70²-20²/60²-20²

Answer 1

Ответ:

1 13/32

Объяснение:

(70^2 - 20^2)/(60^2 - 20^2) = (70-20)(70+20) / (60-20)(60+20) = 50*90 / 40*80 = 4500/3200 = 45/32 = 1 13/32