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2. 3x^2 -5x +2
3. 9x^2 -30x + 25
2x²+(-4x)+3x+(-6)
2x²-4x+3x-6
2. 3x.x + 3x.-1 + (-2.x) + (-2.-1)
3x²+(-3x)+(-2x)+2
3x²-5x+2
3. 3²x²-5²