(17,6²-2,4²)/10 = (17,6²-2,4²)/10 = (309,76-5,76)/10 = 304/10 = 30,4
Подставляя x=-1 и y=1/5 в выражение y(7x-y)+(x-y)², получаем:y(7x-y) = 1/5(7(-1)-1/5) = 1/5(-7-1/5) = 1/5(-35/5-1/5) = 1/5(-36/5) = -36/25(x-y)² = (-1-1/5)² = (-6/5)² = 36/25
Итак, y(7x-y)+(x-y)² = -36/25 + 36/25 = 0
(17,6²-2,4²)/10 = (17,6²-2,4²)/10 = (309,76-5,76)/10 = 304/10 = 30,4
Подставляя x=-1 и y=1/5 в выражение y(7x-y)+(x-y)², получаем:
y(7x-y) = 1/5(7(-1)-1/5) = 1/5(-7-1/5) = 1/5(-35/5-1/5) = 1/5(-36/5) = -36/25
(x-y)² = (-1-1/5)² = (-6/5)² = 36/25
Итак, y(7x-y)+(x-y)² = -36/25 + 36/25 = 0