one of the factors of x³ - 1 is ( ) a) x + 1 b) x + 2 c) x - 1 d) x - 2
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Answers
Answered by
0
Answer:
Step-by-step explanation:
Let the function be represented by f(x).
As x+2, exactly divides f(x),
−2 is a zero of f(x), hence f(−2)=0
f(x)=2x
3
+5x
2
−x−k
f(−2)=2(−2
3
)+5(−2
2
)+2−k=0
⇒0=−16+20+2−k
⇒k=6
Answered by
3
Answer:
x-1 is correct ans because
Step-by-step explanation:
we find zeros by it
x-1=0
x=1
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