(x^2+2x-3)/(x^2-9)*(x^2-5x+6)/(3x^2-x-2)
问题描述:
(x^2+2x-3)/(x^2-9)*(x^2-5x+6)/(3x^2-x-2)
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/前是分子,/后是分母
计算
答
(x^2+2x-3)/(x^2-9)*(x^2-5x+6)/(3x^2-x-2)
什么题目?简化?
(x^2+2x-3)/(x^2-9)*(x^2-5x+6)/(3x^2-x-2)
=(x+3)(x-1)/[(x+3)(x-3)]*(x-2)(x-3)/[(3x+2)(x-1)]
=(x-2)/(3x+2)