SOLUTION: If the graph of y=2x^2-kx+3 touches the x-axis then what are the possible values of k?
Please keep answer in surd form.
Thanks in advance.
Algebra.Com
Question 276484: If the graph of y=2x^2-kx+3 touches the x-axis then what are the possible values of k?
Please keep answer in surd form.
Thanks in advance.
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
d=b^2-4ac
0=(-k)^2-4(2)(3)
0=k^2-24
k^2=24
k=sqrt(24) or k=-sqrt(24)
k=2*sqrt(6) or k=-2*sqrt(6)
Answers: k=2*sqrt(6) or k=-2*sqrt(6)
RELATED QUESTIONS
the graph of the function f(x)=x^2-kx+k+8 touches the x-axis at one point. what are the... (answered by nerdybill)
Prove that the graph {{{f(x)=kx^2-2kx-x^2+2x+k-1}}} touches the x-axis for all values of... (answered by Theo)
If the graph of the parabola y=kx^2+6x+k+8 is tangent to x-axis, then what is the... (answered by oscargut)
p(x)=x^4+kx^2+9
what are all the possible values of k? what are the real... (answered by stanbon)
The roots of x^2+kx+9=0 are real and equal. What are the possible values of... (answered by monika_p)
hey,
could you please solve the following question, thanks,
The graph of function y=... (answered by stanbon,ankor@dixie-net.com)
For what values of k will the equation y = x² + kx + k cross the x- axis... (answered by josgarithmetic)
I NEED HELP. PLEASE HELP ME ASAP. THANKS BEFORE :)
1) The straight line with equation... (answered by richard1234)
Find the range of values of K for which the line {{{y+kx+9=0}}} does not intersect the... (answered by robertb)