find K if -2 is the root of the equation 3x^2-2x+k=0
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Solution :
Given quadratic equation 3x²-2x+k=0
It is given that , -2 is the root of the
equation ,
Now , substitute x = -2 in the equation,
we get
3(-2)² - 2( -2 ) + k = 0
=> 12 + 4 + k = 0
=> 16 + k = 0
=> k = -16
••••
Given quadratic equation 3x²-2x+k=0
It is given that , -2 is the root of the
equation ,
Now , substitute x = -2 in the equation,
we get
3(-2)² - 2( -2 ) + k = 0
=> 12 + 4 + k = 0
=> 16 + k = 0
=> k = -16
••••
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