3(X-5)的平方=2(5-x)

要怎麼做伢.把(X-5)看成整体吗?然后呢.???
2024-11-29 19:08:15
推荐回答(5个)
回答1:

3(x-5)平方=2(5-x)
3(x-5)平方=-2(x-5)
两边同时除以(x-5)
3(x-5)=-2
x-5=-2/3
x=5-2/3
x=4+1/3

回答2:

3(x-5)平方=2(5-x)
3(x-5)^2-2(5-x)=0
3(x-5)^2+2(x-5)=0
(x-5)(3x-15+2)=0
(x-5)(3x-13)=0
x=5

13/3
不懂可追问
满意请采纳
谢谢

回答3:

x=-3或x=2

回答4:

(3x-15+2)(x-5)=0
x=5或x=13/3

回答5:

2﹙x-5﹚²=3﹙5-x﹚
2﹙x-5﹚²+3﹙x-5﹚=0
﹙x-5﹚[2﹙x-5﹚+3]=0
x1=5
x2=﹣3/2+5=3.5