If you assume the form is ax^2 +bx +c =0 then all you have to do is
check for a=0
0=0{ a b c is true so not quadratic and flag it if true
Don Kelly
On 11/6/2015 3:18 PM, Kip Murray wrote:
Most of us have heard of the quadratic formula
x = ( -b +or- %: (b^2 - 4ac) )/2a (roughly standard math notation)
for solving ax^2 + bx + c = 0 for x .
Your mission, should you decide to accept it, is to write a verb quad
that takes
vector a,b,c as argument, says “Not quadratic” if a is 0 , and otherwise
uses the quadratic formula to find the values of x, reporting them in a
vector.
quad 2 _8 6
3 1
quad 0 _8 6
Not quadratic
--Kip Murray
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
