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2. (2x+3)(3x-1) = 6x^2 - 2x+ 9x -3 = 6x^2 +7x-3
3. 2x(x+5) = 2x^2 +10x
4. (x+5) x-3 = x^2 +5x-3x -15 = x^2 +2x -15
2. 6x² -2x+9x-3
3. 2x²+10x
4. x²-3x+5x-15
maaf kalo ada yang salah