Posted by priya on Tuesday, November 2, 2010 at 1:29am.
I need help with this question
determine the values in k for which the function f(x)= 4x^23x+2kx+1 has two zeros. Check these values in the original equation.
i don't get how to do it please help me.

math grade 11  Henry, Thursday, November 4, 2010 at 7:45pm
F(x) = Y = 4x^2  3x + 2kx + 1.
This problem was solved by using EXCEL spread sheets and trial & error.
First, I temporarily ignored the 3rd term (2kx); and I changed b (the coefficient of x) until I found the required zeroes. Then I calculated the corresponding value of k:
b = 3 + 2k = 5,
3 + 2k = 5,
2k = 5 + 3,
2k = 8,
k = 8 / 2 = 4.
5 was chosen for b because it gave 2
zeroes.
So when k = 4: (1 , 0) , (1/4 , 0).
Answer This Question
Related Questions
 math grade 11  I need help with this question determine the values in k for ...
 math  Determine the values of k for which the function f(x)= 4x^23x+2kx+1 has ...
 math  Determine the values of k for which the function f(x)= 4x^23x+2kx+1 has ...
 math grade 11  Determine the value of k for which the function f(x)= 4x^2 3x+...
 math  Determine the values of k for which the function f(x)=4x^23x+2kx+1 has ...
 Math  For what values of k will the functon f(x)=kx^24x+k have no zeros ...
 Math  Determine the values of k for which the function f(x)=4x^23x+2kx+1 has 2...
 Math  For what values of k does the function f(x)=(k+1)x^2+2kx+k1 have no ...
 Math  Q.1)If one zero of the polynomial 3x2kx2 is 2 find the other zero.allso...
 Math( help please ! )  For what values of k will the function f(x)=3x^2+4x+k=0 ...
More Related Questions