11. If x2 + 1 = 2x, then the value of
4
X+
1
2
X х
is
x2-3x+1
Answers
Answered by
1
Answer:
x
2
+2=2x
⇒x
2
−2x+2=0⟶1
To find
x
4
−x
3
+x
2
+2
=x
4
+2x
3
+2x
2
+x
3
−x
2
+2
=(x
4
−2x
3
+2x
2
)+(x
3
−2x
2
+2x)+(x
2
−2x+2)
=x
2
(x
2
−2x+2)+x(x
2
−2x+2)+(x
2
−2x+2)
=x
2
(0)+x(0)+0from⟶1
=0
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