rozwiąż nierównosc:
(x-2) (x+2) więkrze od badz równe 2(x+1)kwadrat -(x-3)kwadrat-7
(x-2)(x+2) >= 2(x+1)^2 -(x-3)^2 -7
x^2 - 4 >= 2(x^2 +2x+1) -(x^2 -6x+9) -7
x^2 - 4 >= 2x^2 + 4x +2 -x^2 +6x-9-7
x^2 -2x^2 +x^2 - 6x >= 4+2-9-7+4
-6x >= -6 I:(-6)
x <= 1
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xe (-oo; 1>
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(x-2)(x+2) >= 2(x+1)^2 -(x-3)^2 -7
x^2 - 4 >= 2(x^2 +2x+1) -(x^2 -6x+9) -7
x^2 - 4 >= 2x^2 + 4x +2 -x^2 +6x-9-7
x^2 -2x^2 +x^2 - 6x >= 4+2-9-7+4
-6x >= -6 I:(-6)
x <= 1
======
xe (-oo; 1>