Oblicz\ nie równość
a ) 4(x-3)² - (2x-5)² ≥2
4(x²-6x +9) - (4x²-20x+25) ≥ 2
4x² - 24x +36 -4x² +20x -25 ≥ 2
-24x +20x ≥ 2 -36 +25
- 4x ≥ -9 /:(-4)
x ≤ 9/4
x ≤ 2 1/4
x∈ ( -∞ , 2 1/4 >
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4(x²-6x +9) - (4x²-20x+25) ≥ 2
4x² - 24x +36 -4x² +20x -25 ≥ 2
-24x +20x ≥ 2 -36 +25
- 4x ≥ -9 /:(-4)
x ≤ 9/4
x ≤ 2 1/4
x∈ ( -∞ , 2 1/4 >