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4x 12x 7 0. X2-7x+12 0. x2=7. (x+2)(x-7). x^2-7x+12x.
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4x 12x 7 0. X²-12x+36. (х^2-81)^2 +(x^2+5x-36)^2=0. x2-12+36x2+2 x2-3x. x+17x-8x+6x=1824.
4x 12x 7 0
4x 12x 7 0. X ^2+4x+1- x^3+x^2+12x-12x >2. решение (1,5x-4)-(6+2,5x). 5x-112-2x+18 x-1. 4x-12>2 2x+1<11.
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