2х^2 = (x+1)(x+2) + 26
2x^2 = x^2 +3x+2+26
x^2 -3x-28 = 0 (х+4)(х-7) = 0 х=7Числа 7, 8, 9
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2х^2 = (x+1)(x+2) + 26
2x^2 = x^2 +3x+2+26
x^2 -3x-28 = 0 (х+4)(х-7) = 0 х=7
Числа 7, 8, 9