if both (x+1) and(x-2) are factors of polynomial p(x) =3x³+ax²+bx-8 find a and b
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Answered by
1
Answer:
don't know about it as I have not studied it
Answered by
1
Answer:
put x= -1
-3+ a-b-2=0
a-b=5
put x= 2
24 + 4a + 2b -2=0
2a +b = -11
As a= 5+b
10 + 3b= -11
3b = -21
B= -7
A= -2
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