If ( x + k ) is a factor of 2x 2 + 2kx +5x +10, then find the value of k.
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f(x)=2x²+2kx+5x+10
q(x)=x+k
x=-k
As you know, factor means leaving remainder 0
putting value of x in f(x)
2(-k)²+2k(-k)+5(-k)+10=0
2k²-2k²-5k+10
-5k=-10
k=2
q(x)=x+k
x=-k
As you know, factor means leaving remainder 0
putting value of x in f(x)
2(-k)²+2k(-k)+5(-k)+10=0
2k²-2k²-5k+10
-5k=-10
k=2
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