a)
Dziedzina = x ≠ -1 i x ≠ -4
(4 - x)(x + 4) = (10 - 3x)(x + 1)
16 - x² = 10x + 10 - 3x² - 3x
2x² - 7x + 6 = 0
Δ = (-7)² - 4 × 2 × 6 = 49 - 48 = 1
√Δ = 1
b)
Dziedzina = x ≠
4x + 3 = 4(2x - 5)
4x + 3 = 8x - 20
-4x = -23
x =
c)
Dziedzina = x ≠ -2
2x - 1 ≤ 3(x+2)
2x - 1 ≤ 3x+6
-x ≤ 7
x ≥ -7
x ∈ <-7, +∞)
Uwzględniają dziedzinę x ≠ -2 wychodzi:
x ∈ <-7, -2) ∪ (-2, +∞)
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a)
Dziedzina = x ≠ -1 i x ≠ -4
(4 - x)(x + 4) = (10 - 3x)(x + 1)
16 - x² = 10x + 10 - 3x² - 3x
2x² - 7x + 6 = 0
Δ = (-7)² - 4 × 2 × 6 = 49 - 48 = 1
√Δ = 1
b)
Dziedzina = x ≠
4x + 3 = 4(2x - 5)
4x + 3 = 8x - 20
-4x = -23
x =
c)
Dziedzina = x ≠ -2
2x - 1 ≤ 3(x+2)
2x - 1 ≤ 3x+6
-x ≤ 7
x ≥ -7
x ∈ <-7, +∞)
Uwzględniają dziedzinę x ≠ -2 wychodzi:
x ∈ <-7, -2) ∪ (-2, +∞)