SOLUTION: A). x^2-4x+9=0 B). 1/(5x )-1/4x +1/3x=(-17)/60 need help with showing the steps to break the problem down to get the answer. thank you.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: A). x^2-4x+9=0 B). 1/(5x )-1/4x +1/3x=(-17)/60 need help with showing the steps to break the problem down to get the answer. thank you.       Log On


   

Question 1017055: A). x^2-4x+9=0
B). 1/(5x )-1/4x +1/3x=(-17)/60

need help with showing the steps to break the problem down to get the answer. thank you.
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
A) x%5E2-4x%2B9 = 0.

   Use the quadratic formula 

   x%5B1%2C2%5D = %284+%2B-+sqrt%284%5E2+-+4%2A9%29%29%2F2 = %284+%2B-+sqrt%28-20%29%29%2F2 = %284+%2B-+2%2Asqrt%28-5%29%29%2F2 = 2+%2B-+sqrt%285%29%2Ai.

----------------------------------------------- 
Unfortunately, you failed to use parentheses properly, so your writing is ambiguous. 
I read it like this and I am not responsible if it is wrong. The responsible side are you.


B) 1%2F%285x+%29-1%2F4x+%2B1%2F3x = %28-17%29%2F60.

   Multiply both sides by (5*4*3*x) = 60x, which is the common denominator. You will get

   12 - 15 + 20 = -17x.

   Now solve it yourself.