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3x-x² = 2x² +x + 4x +2 -1
3x - x² - 2x² -x - 4x= 2 -1
-2x - 3x²= 1
b)(x-1)(x+2)=(2x-3)(x+4)
x² +2x -x -2= 2x² +8x -3x -12
x² +2x -x - 2x² - 8x +3x = 2-12
-x² -4x=-10
c)(2x-1)(2x-1)=(3-x)(x-6)
4x² - 2x - 2x +1=3x -18 -x² +6x
4x² - 2x - 2x - 3x + x² -6x= -18-1
5x² -13x=-19