Числа х, х+1, х+2. Уравнение (3х+3)^2-862=x^2+(x+1)^2+(x+2)^2 9x^2+18x+9-862=x^2+x^2+2x+1+x^2+4x+4 6x^2+12x-858=0 (:6) x^2+2x-143=0 x=-1+-12 x=11 (11, 12, 13) x=-13 (-13, -12, -11) 1)11+12+13 =36 2)-13-12-11=-36
Числа х, х+1, х+2. Уравнение
(3х+3)^2-862=x^2+(x+1)^2+(x+2)^2
9x^2+18x+9-862=x^2+x^2+2x+1+x^2+4x+4
6x^2+12x-858=0 (:6)
x^2+2x-143=0
x=-1+-12
x=11 (11, 12, 13)
x=-13 (-13, -12, -11)
1)11+12+13 =36
2)-13-12-11=-36