Find the value of k, if x + 2 is a factor of p(x)=4x^3+6x^2-kx +2
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If x + 2 is the factor then x = -2 ____(1)
Now putting the values to the given question from equation (1) we get ,
p(-2) = 4(-2)^3+6(-2)^2-k(-2) +2 =0
-8^3-6+2k+2 =0
-8^3-6+2= -2k
-8^3-4= -2k
Now Lcm of 3and 1 =3
-8^3-12^3 =-2k
-20^3= -2k
k = -20^3*-2
k = 40^3
Hope it helps u ; )
Now putting the values to the given question from equation (1) we get ,
p(-2) = 4(-2)^3+6(-2)^2-k(-2) +2 =0
-8^3-6+2k+2 =0
-8^3-6+2= -2k
-8^3-4= -2k
Now Lcm of 3and 1 =3
-8^3-12^3 =-2k
-20^3= -2k
k = -20^3*-2
k = 40^3
Hope it helps u ; )
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