Question

If (x+1) is a factor of the polynomial (2x²+ kx) then k=?
1)4
2)-3
3)2
4)-2​

Answer 1

Answer:

Step-by-step explanation:

x+1 is a factor of the polynomial

so

x+1=0

x=-1

putting value of x in polynomial

2x²+kx=0

2[-1]²+k[-1]=0

-k=2

k=-2

hope it helps u

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Answer 2

x+1=0

x=-1

Let p(x)= 2x²+ kx

Since, (x+1) is a factor of p(x) then

p(-1)=0

2(-1)²+k(-1)=0

2-k=0

2=k

k=2

Hence the value of k is 2