rozwiąż nierówność (2x-3)(2x+3)≤(2x-1)^2
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4x^2 - 9 ≤ 4x^2 - 4x +1
4x ≤ 10 /:4
x≤ 5/2
x∈(-∞ , 5/2>
(2x-3)(2x+3)=4x^2-9 -->(a+b)(a-b)=a^2-b^2
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4x^2 - 9 ≤ 4x^2 - 4x +1
4x ≤ 10 /:4
x≤ 5/2
x∈(-∞ , 5/2>
(2x-3)(2x+3)=4x^2-9 -->(a+b)(a-b)=a^2-b^2