Hence by using a suitable substitution ,solve the equation 25^2(5x+3)=50x+24
人气:135 ℃ 时间:2020-06-18 08:11:40
解答
题目再清楚表述一下,25^2(5x+3)?括号前面是什么?是25x^2(5x+3)=50x+24是25乘以X的平方,再乘以(5x+3)吗?是的,麻烦你把过程也给出来。。。令5x+3=t,则5x=t-3则原式变形为 (t-3)^2*t=10(t-3)+24化简 t^3-6*t^2-(t-6)=0t^2(t-6)-(t-6)=0(t-6)*(t+1)*(t-1)=0则t=6或1或-1则x=3/5或-2/5或-4/5
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