1. Rozwiąż równanie:
2. Doprowadź do jak najprostszej postaci:
-3(x-5) ≤ (2x-8)
-3x + 15 ≤ 2x - 8
-5x ≤ -23
5x ≥ 23
x ≥ 23/5
x∈ <23/5, +∞)
4(2x-5)+(x-2)(2x+8)= 8x - 20 + 2x² + 8x - 4x - 16 = 2x² + 12x - 36
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-3(x-5) ≤ (2x-8)
-3x + 15 ≤ 2x - 8
-5x ≤ -23
5x ≥ 23
x ≥ 23/5
x∈ <23/5, +∞)
4(2x-5)+(x-2)(2x+8)= 8x - 20 + 2x² + 8x - 4x - 16 = 2x² + 12x - 36