Find the value of k , x 1 is a factor of p(x).p(x)=2x3 x2 - 2x k ?
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HEY!!
x+1=0
so, x= -1
now, p(x)= 2x3+x2-2x+k
p(-1)= 2(-1)3+(-1)2-2(-1)+k
= -2+1+2+k
now, you will have to equate the above eqation to 0
i.e,
-2+1+2+k= 0
-2+2+1+k= 0
1+k= 0
therefore,
k= -1
x+1=0
so, x= -1
now, p(x)= 2x3+x2-2x+k
p(-1)= 2(-1)3+(-1)2-2(-1)+k
= -2+1+2+k
now, you will have to equate the above eqation to 0
i.e,
-2+1+2+k= 0
-2+2+1+k= 0
1+k= 0
therefore,
k= -1
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