যদি x4−2x2+1 = 0 হয় তবে x এর মান কত?

A 1

C 2

D 4

Solution

Correct Answer: Option A

x⁴ -2x²+1=0
বা , ( x²)² -2. x².1+(1)² =0
বা , ( x²-1)²=0
বা ,  x²-1=0
বা ,   x² =1
∴  x=1

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