anonymous
  • anonymous
fifteen times the square of a non-zero number is equal to 20 times the number
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Helpp Pleasee
harsimran_hs4
  • harsimran_hs4
let the number be x square of the number is : x^2 so the equation becomes 15*(x^2) = 20*x can you solve it now ?
anonymous
  • anonymous
Noo..(: Answerr Please

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harsimran_hs4
  • harsimran_hs4
15x^2 - 20x = 0 5x(3x - 4) = 0 tell me the solutions now ?
anonymous
  • anonymous
I Need dha answer im doing a test lol ian got time to be thinking and solving
harsimran_hs4
  • harsimran_hs4
now you should be able to Here we guide and help and WE DON`T give direct answer i have taken you to last step i want you to atleast try
anonymous
  • anonymous
I like @harsimran_hs4 's approach. That's fair.
anonymous
  • anonymous
Do i Multiply the 5 and 3 ?? and then subtract 4?
harsimran_hs4
  • harsimran_hs4
consider pq = 0 , so what are the possible solutions either p = 0 or q = 0 or both are zero now if you carefully observe in above equation p = 5x and q = 3x-4 now tell what are possible values of x ?
anonymous
  • anonymous
its 5x and 3x ???
harsimran_hs4
  • harsimran_hs4
look either 5x can be zero or 3x-4 can be zero or both if 5x = 0 then x = 0 if 3x-4 = 0 then x = 4/3 but the number is non zero so x = 4/3
harsimran_hs4
  • harsimran_hs4
since you had problem understanding , try and analyze each step and ask if there is any doubt
anonymous
  • anonymous
It Says That Was Wrong But Thanks Anyway (:
anonymous
  • anonymous
Really? \(\frac{4}{3}\) Is wrong? I don't think so... \(15(\frac{4}{3})^2=20\frac{4}{3}\) \(15(\frac{16}{9})=\frac{80}{3}\) \(\frac{240}{9}=\frac{80}{3}\)
harsimran_hs4
  • harsimran_hs4
and yes since it was a quadratic eq it can have atmost 2 real solutions and they are 0 (which you can easily see) and 4/3 (which @KeithAfasCalcLover showed above) so check if you copied the statement correctly
anonymous
  • anonymous
k

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