(1.5x-4y) (1.5x+4y+3) - 4.x + 12y
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I couldn't simplify more than that sorry
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1.5x (1.5x+4y+3) -4y (1.5+4y+3)-4.5x+12y
2.25x+6y-6xy+4.5-4.5x-16y square -12y+12y
=2.25xsquare -16y square
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