(2x-2)(2x+2)+2x²=2
4x²-4+2x²=2
6x²=6
x²=1
x=1 и х=-1 1>-1
Ответ: 1
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(4а+9а) -(а-1+9а) = 13а-(10а-1)= 3а+1
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Ответ:
{-7;2}
Объяснение:
-х^4-10х^3-29х^2-20х+252=0
![\displaystyle\\x^4+10x^3+29x^2+20x-252=0\\\\(x^4+10x^3+25x^2)+(4x^2+20x)+4-256=0\\\\(x^2+5x)^2+4(x^2+5x)+4-16^2=0\\\\(x^2+5x+2)^2-16^2=0\\\\(x^2+5x+2-16)(x^2+5x+2+16)=0\\\\(x^2+5x-14)(x^2+5x+18)=0\\\\1)x^2+5x-14=0;D=25+4*14=81\\\\x_1=(-5-9)/2=-7\\\\x_2=(-5+9)/2=2\\\\2)x^2+5x+18=0;D=25-4*18<0;net\ kornej\\\\Otvet:\{-7;2\}](https://tex.z-dn.net/?f=%5Cdisplaystyle%5C%5Cx%5E4%2B10x%5E3%2B29x%5E2%2B20x-252%3D0%5C%5C%5C%5C%28x%5E4%2B10x%5E3%2B25x%5E2%29%2B%284x%5E2%2B20x%29%2B4-256%3D0%5C%5C%5C%5C%28x%5E2%2B5x%29%5E2%2B4%28x%5E2%2B5x%29%2B4-16%5E2%3D0%5C%5C%5C%5C%28x%5E2%2B5x%2B2%29%5E2-16%5E2%3D0%5C%5C%5C%5C%28x%5E2%2B5x%2B2-16%29%28x%5E2%2B5x%2B2%2B16%29%3D0%5C%5C%5C%5C%28x%5E2%2B5x-14%29%28x%5E2%2B5x%2B18%29%3D0%5C%5C%5C%5C1%29x%5E2%2B5x-14%3D0%3BD%3D25%2B4%2A14%3D81%5C%5C%5C%5Cx_1%3D%28-5-9%29%2F2%3D-7%5C%5C%5C%5Cx_2%3D%28-5%2B9%29%2F2%3D2%5C%5C%5C%5C2%29x%5E2%2B5x%2B18%3D0%3BD%3D25-4%2A18%3C0%3Bnet%5C%20kornej%5C%5C%5C%5COtvet%3A%5C%7B-7%3B2%5C%7D)