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2x2-2>3x-2x-2
2x>x-2
2x-x>-2
x>-2
b)2x2 - 3x+4>-x2+2-7
4x-3x+4>2x+2-7
x+4>2x-5
-x>-9/(-1)
x=9
2x2-2>3x-2x-2
2x>x-2
2x-x>-2
x>-2
4x²-4>3x²-6x-2x+4
4x²-4-3x²+8x-4>0
x²+8x-8>0
Δ=64+32=96
√Δ=√96
x₁= -8-√96/2
x₂= -8+√96/2
x∈ (-∞, -8-√96/2) U (-8+√96/2, +∞)
B)2x² - 3x+4>-x²+2-7
2x² - 3x+4+x²+5 >0
3x²-3x+9>0
Δ=9-108 = -99
Δ<0 , brak miejsc zerowych