(3x–4)(x+2)–(x+5)(x–3)
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(3x–4)(x+2)–(x+5)(x–3)(3x–4)(x+2)–(x+5)(x–3)(3x–4)(x+2)–(x+5)(x–3)原式=3x²+6x-4x-8-x²+3x-5x+
(3x–4)(x+2)–(x+5)(x–3)
(3x–4)(x+2)–(x+5)(x–3)
(3x–4)(x+2)–(x+5)(x–3)
原式=3x²+6x-4x-8-x²+3x-5x+15
=2x²+7
(3x–4)(x+2)–(x+5)(x–3)
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x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2
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