SOLUTION: 13. Solve 2x = 5x2 for x. A. 0 and 0.431 B. 0 and 2.322 (this answer is wrong) C. 2.322 D. 0.431

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: 13. Solve 2x = 5x2 for x. A. 0 and 0.431 B. 0 and 2.322 (this answer is wrong) C. 2.322 D. 0.431       Log On


   

Question 621220: 13. Solve 2x = 5x2 for x.
A. 0 and 0.431


B. 0 and 2.322 (this answer is wrong)


C. 2.322


D. 0.431
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
This one: 2x = 5x2 let's first subtract 2x to get:
0 = 5x2-2x
Now plug this into the quadratic formula and we get:
x=.4 or 0
Make sense?
RJ
www.math-unlock.com