if x3+2x2+ax+b has factors x+1 and x-1 then find a,b
Answers
Answered by
8
Answer:
f(1) and f(−a) both are equal to 0 by factor theorem.
∴ f(1)=1+2+a+b=0 and f(−a)=−a
3
+2a
2
−a
2
+b=0
∴ a+b=−3 and −a
3
+a
2
+b=0
Thus, on solving two equations we get, a=−1 and b=−2
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Answered by
0
Answer:
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Step-by-step explanation:
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