Rozwiąż nierówność -9 (2 - x)² - (1 - 3x) (3x + 1) < 11
Proszę o dokładne obliczenia, krok po kroku.
... -9(2²-2*2*x + x²) -(1-3x)(1+3x) < 11
- 9 ( 4 - 4x +x²) - ( 1² - (3x)²) < 11
-36 + 36x -9x² -(1 - 9x²) < 11
-36 +36x -9x² -1+9x² <11
36x < 11 + 37
36 x< 48 /:36
x < 48/36
x < 4/3
x∈ ( -∞ , 4/3 )
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... -9(2²-2*2*x + x²) -(1-3x)(1+3x) < 11
- 9 ( 4 - 4x +x²) - ( 1² - (3x)²) < 11
-36 + 36x -9x² -(1 - 9x²) < 11
-36 +36x -9x² -1+9x² <11
36x < 11 + 37
36 x< 48 /:36
x < 48/36
x < 4/3
x∈ ( -∞ , 4/3 )