simplify (5x+2)(2-3x)-(x-3)(x+2)
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(5x+2)(2-3x) - (x-3)(x+2)
= [5x(2-3x) +2(2-3x) ] - [ x(x+2) -3(x+2)]
= 10x-15x²+4-6x - (x²+2x-3x-6)
= 4x-15x²+4 -x²-2x+3x+6
= -16x² +5x+10
= [5x(2-3x) +2(2-3x) ] - [ x(x+2) -3(x+2)]
= 10x-15x²+4-6x - (x²+2x-3x-6)
= 4x-15x²+4 -x²-2x+3x+6
= -16x² +5x+10
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