if x^2 + 2x + 4 = 0, then x^4/4 + 8/x -3 = ?
Answers
Answered by
7
The required value is -7
Step-by-step explanation:
Given, x^2 + 2x + 4 = 0
x^2=-2x-4
=>x^2/2 = -x-2
=> x^4/4 = x^2+4+4x
=>x^4/4 = (x^2+2x+4)+ 2x
=>x^4/4 = 0+2x, from the question
=>x^4/4 = 2x ........a
Again, x^2 + 2x + 4 = 0
x^2+4 =-2x
=>x+ 4/x =-2
=>8/x = -2x-4.........b
Using a and b , we have
x^4/4 + 8/x -3
=2x -2x -4 - 3
= -7
Answered by
0
Answer:
103. If
+ + = ,
+
− 3=?
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