SOLUTION: I need help on a proprtion, 2u-3/4u=u-1/u I did cross product method on this one and i got 2u(squared)-3u= 4u (squared)-4u then i isolated the u and the u (squared) and c

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Question 795: I need help on a proprtion,
2u-3/4u=u-1/u I did cross product method on this one and i got
2u(squared)-3u= 4u (squared)-4u then i isolated the u and the u (squared) and came out with u=2u(squared). I think i did this all right, but i'm not sure what the u would be. I missed this lesson in math becuase i'm on homebound school because of an illness i have. If you can please help me out i would appreciate it. Thank You.
Found 3 solutions by pushpaharan, JimMarshall, MathTherapy:
Answer by pushpaharan(47)   (Show Source): You can put this solution on YOUR website!
2u-3/4u=u-1/u
2u-u = 1/u+3/4u
u= 7/4u
u^2 = 7/4
u= Sqrt(7/4) = 1.32
Answer by JimMarshall(82)   (Show Source): You can put this solution on YOUR website!
2u-3/4u=u-1/u
2u-u = 1/u+3/4u
u= 7/4u
u^2 = 7/4
u= Sqrt(7/4) = 1.32 Ans
Answer by MathTherapy(10551)   (Show Source): You can put this solution on YOUR website!

I need help on a proprtion,
2u-3/4u=u-1/u I did cross product method on this one and i got
2u(squared)-3u= 4u (squared)-4u then i isolated the u and the u (squared) and came out with u=2u(squared). I think i did this all right, but i'm not sure what the u would be. I missed this lesson in math becuase i'm on homebound school because of an illness i have. If you can please help me out i would appreciate it. Thank You.
It appears as though you mean: , with . If so, you need to use PARENTHESES next time



u(2u - 3) = 4u(u - 1) ------- Cross-multiplying





 ------- You're correct up to this point.



2u - 1 = 0                   OR               u = 0 (ignore) 

2u = 1

 

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