(0.6)/(2X-1)-(1.5)/(3X+2)=1.5的解?

来源：百度知道编辑：UC知道时间：2024/06/23 15:30:56

要有解的过程哈!

(0.6)/(2X-1)-(1.5)/(3X+2)=1.5
等式两边同时乘以10(2X-1)(3X+2)，得
6(3X+2)-15(2X-1)=15(2X-1)(3X+2)
18X+12-15X+15=90X^2+15X-30
90X^2+12X-57=0
30X^2+4X-19=0
b^2-4ac=4*4-4*30*（-19）=2296>0
X1=[-b+(b^2-4ac)^(1/2)]/2a
=[-4+2296^(1/2)]/2*30
=11/15
X2=[-b-(b^2-4ac)^(1/2)]/2a
=[-4-2296^(1/2)]/2*30
=-13/15

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