n^2 + (n + 1)^2 + (n + 2)^2 = 2030 n^2 + n^2 + 2n + 1 + n^2 + 4n + 4 = 2030 3n^2 + 6n + 5 - 2030 = 0 3n^2 + 6n - 2025 = 0 n^2 + 2n - 675 = 0 n^2 + 27n - 25n - 675 = 0 n(n + 27) - 25(n + 27) = 0 (n - 25)(n + 27) = 0 Отсюда
n = 25,
n +1 = 26,
n + 2 = 27.
x^2+(x+1)^2+(x+2)^2=2030
x^2+x^2+2x+1+x^2+4x+4-2030=0
3x^2+6x-2025=0
x^2+2x-675=0
D=4+2700=2704=52^2
x1=(-2-52)/2=-27 не натуральное
x2=25
эти числа 25, 26, 27
n^2 + (n + 1)^2 + (n + 2)^2 = 2030
n^2 + n^2 + 2n + 1 + n^2 + 4n + 4 = 2030
3n^2 + 6n + 5 - 2030 = 0
3n^2 + 6n - 2025 = 0
n^2 + 2n - 675 = 0
n^2 + 27n - 25n - 675 = 0
n(n + 27) - 25(n + 27) = 0
(n - 25)(n + 27) = 0
Отсюда
n = 25,
n +1 = 26,
n + 2 = 27.
x^2+(x+1)^2+(x+2)^2=2030
x^2+x^2+2x+1+x^2+4x+4-2030=0
3x^2+6x-2025=0
x^2+2x-675=0
D=4+2700=2704=52^2
x1=(-2-52)/2=-27 не натуральное
x2=25
эти числа 25, 26, 27