## shinda 3 years ago What code would I use to get the positive root of a quadratic equation?

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1. across

There are several numerical methods that accomplish this task; try looking into Newton's method.

2. drichmond6021023

why not use an if ans to the quadratic eq is positive use it otherwise ignore it?

3. harsimran_hs4

try it this way 1) function that computes the roots 2) filter out the positive ones for the 1st part i remember thats there a problem set that covers this part using newton`s method check that out...

4. jgoldsmith

Do you remember the old quadratic equation from grade school?$x =\frac{ \pm \sqrt{b ^{2}-4ac}\ }{2a }$ Because of the plus or minus, two roots will be given. However, it is very important to note that zero, one, or both of the roots could be positive. If I were to write a program given your specifications, I would create a function that plugs an x into the quadratic formula for a given a, b, and c, and then return the positive roots (if any). Let me know if you have any more questions!