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5x+2-8x+4≥-3
-3x≥-9
x<3
b) (x-3)(x+3)-(x-2)²
x²-9-x²+4x-4<19
x<32
5x+2-8x+4≥-3
5x-8x≥-2-4-3
-3x≥-9/:(-3)
x≥3
b) (x-3)(x+3)-(x-2)²<19
x-3+x+3-(x+2)²<19
x+x-x²<3-3+19-4
2x-x²<15
5x+2-8x+4≥-3
5x-8x≥-3-2-4
-3x≥-9/:(-3)
x≥3
b) (x-3)(x+3)-(x-2)²<19
x²+3x-3x-9-x²-4<19
-9-x²+x²-4<19
-13<19