Find the value of x3+2x2+4x+25 if x=1+2i.
pls give step by step ans.
Answers
Answered by
0
Answer:
What is this it is written in other language!!
Answered by
1
Answer:
Correct option is
A
1
x
3
+2x
2
−3x+21 if x=1+2i
(x−1)
2
=(2i)
2
x
2
−2x+1=−4
x
2
−2x+5=0
∴x
3
+2x
2
−3x+21
=x(x
2
−2x+5)+4x
2
−8x+21
=0+4x
2
−8x+21
=4(x
2
−2x+5)+1
=0+1
=1
Value is 1.
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