3x(x+2)-(x+1)(3x-4)
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3x(x+2)-(x+1)(3x-4)3x(x+2)-(x+1)(3x-4)3x(x+2)-(x+1)(3x-4)=3x²+6x-(3x²-x-4)=7x+4
3x(x+2)-(x+1)(3x-4)
3x(x+2)-(x+1)(3x-4)
3x(x+2)-(x+1)(3x-4)
=3x²+6x-(3x²-x-4)=7x+4
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