Ответ: 6
Объяснение: (^ -знак степени)
((6x+1)(x-2)-(x+2)(x-1)) /(x+2)(x-2) =4 ( (6x^2-11x-2)-(x^2+x-2)) /(x^2-4)=4
(6x^2-11x-2-x^2-x+2) /(x^2-4) =4 (5x^2 -12x) /(x^2-4) =4/1,
5x^2 -12x=4(x^2-4), 5x^2 -12x-4x^2+16=0, x^2-12x+16=0,
D=144-64=80, x1=(12+4V5) /2=6+2V5, x2=6-2V5,
(x1+x2)/2=12/2=6
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Ответ: 6
Объяснение: (^ -знак степени)
((6x+1)(x-2)-(x+2)(x-1)) /(x+2)(x-2) =4 ( (6x^2-11x-2)-(x^2+x-2)) /(x^2-4)=4
(6x^2-11x-2-x^2-x+2) /(x^2-4) =4 (5x^2 -12x) /(x^2-4) =4/1,
5x^2 -12x=4(x^2-4), 5x^2 -12x-4x^2+16=0, x^2-12x+16=0,
D=144-64=80, x1=(12+4V5) /2=6+2V5, x2=6-2V5,
(x1+x2)/2=12/2=6