One of the roots of quadratic equation 2X square + kx-2=0 is -2 find k
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Hi ,
It is given that -2 is one root of quadratic
equation 2x² + kx -2 = 0
To find value of k , we have to substitute
x = -2 , in equation
2 × (-2)² + k ×( -2 ) - 2 = 0
8 - 2k -2 = 0
6 - 2k = 0
-2k = -6
k = ( -6 )/( -2 )
k = 3
I hope this helps you.
: )
k = -6/2
k = -3
It is given that -2 is one root of quadratic
equation 2x² + kx -2 = 0
To find value of k , we have to substitute
x = -2 , in equation
2 × (-2)² + k ×( -2 ) - 2 = 0
8 - 2k -2 = 0
6 - 2k = 0
-2k = -6
k = ( -6 )/( -2 )
k = 3
I hope this helps you.
: )
k = -6/2
k = -3
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