X power 5 +3 X power 4- +5x power3 + 14x power 2 +30x-16 by X power 3 X power 2 + X+8 divide ? what answer?
Answers
Answered by
0
Answer:
Answer
Let us first divide the given polynomial x
4
+x
3
+8x
2
+ax+b by (x
2
+1) as shown in the above image:
From the division, we observe that the quotient is x
2
+x+7 and the remainder is (a−1)x+(b−7).
Since it is given that x
4
+x
3
+8x
2
+ax+b is exactly divisible by x
2
+1, therefore, the remainder must be equal to 0 that is:
(a−1)x+(b−7)=0
⇒(a−1)x+(b−7)=0⋅x+0
⇒(a−1)=0,(b−7)=0(Bycomparingcoefficients)
⇒a=1,b=7
Hence, a=1 and b=7.
Similar questions