Rozwiąż równania
(x-3)^2-(2x+4)^2<2 1/3 - 3x^2
(x-3)^2-(2x+4)^2<7/3 - 3x^2 /*3
3(x-3)^2-3(2x+4)^2<7 - 3*3x^2
3(x^2-6x+9)-3(4x^2+16x+16)<7 - 9x^2
3x^2 - 18x + 27 - 12x^2 - 48x - 48 < 7 - 9x^2
-9x^2 - 66x - 21 < 7 - 9x^2 /+9x^2
-66x - 21 < 7 /+21
-66x < 28 /:(-66)
x > -28/66
x > -14/33
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(x-3)^2-(2x+4)^2<2 1/3 - 3x^2
(x-3)^2-(2x+4)^2<7/3 - 3x^2 /*3
3(x-3)^2-3(2x+4)^2<7 - 3*3x^2
3(x^2-6x+9)-3(4x^2+16x+16)<7 - 9x^2
3x^2 - 18x + 27 - 12x^2 - 48x - 48 < 7 - 9x^2
-9x^2 - 66x - 21 < 7 - 9x^2 /+9x^2
-66x - 21 < 7 /+21
-66x < 28 /:(-66)
x > -28/66
x > -14/33