(2x-1)²=1-4x
4x²-4x+1=1-4x
4x²=0
x²=0
x=0
X + y = 34
x^2 - y^2 = - 408
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y = 34 - x
x^2 - ( 34 - x )^2 = - 408
x^2 - ( 1156 - 68x + x^2 ) = - 408
x^2 - x^2 + 68x - 1156 = - 408
68x = 748
x = 11 ( первое число )
y = 34 - 11 = 23 ( второе число )