SOLUTION: Solve:
"Determin "k" if -2 is a root of:
2x^2+ky+2=0
Algebra.Com
Question 95134: Solve:
"Determin "k" if -2 is a root of:
2x^2+ky+2=0
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
"Determine "k" if -2 is a root of:
2x^2+kx+2=0
-------------
If -2 is a root, f(-2)=0
f(x)=2x^2+kx+2
f(-2)=2(-2)^2+k(-2)+2=0
8-2k+2=0
-2k=-10
k=5
============
Cheers,
Stan H.
RELATED QUESTIONS
Please help me with this.
Determin "k" if -2 is a root of
2x^2+ kx +2... (answered by scott8148)
what is the value of K for 2x+ky=5 if this
equation is perpendicular to... (answered by uma)
If one root of the equation ... 2x^2+10x+k=0 is -2, find K and the other... (answered by robertb,ewatrrr)
An equation of a line is 8x+ky-6=0. if the line passes through (1, -2)what is the value... (answered by MathLover1)
If (root 3 -1) is a root of the equation 2x^2=2kx+4=0, then k... (answered by Alan3354)
if line 2x + ky = 5 passes through the point (-2, 1), find k. This is the... (answered by Fombitz)
Find the value of k for which the graph of 6x-ky= 2 is perpendicular to 2x+3y=... (answered by oberobic)
If the equations x^2+2x-3=0 & x^2+3x-k=0 have a comman root then the non-zero value of k... (answered by sachi)
If the line {{{x + ky = 10}}} is a tangent to the curve {{{x^2 + y^2 = 10}}}, find the... (answered by richwmiller)