Toán Lớp 8: Tìm x
( x^2 – 2x )^2 – 2( 2x – x^2 ) + 1 = 0
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Toán Lớp 8: Tìm x
( x^2 – 2x )^2 – 2( 2x – x^2 ) + 1 = 0
Comments ( 2 )
= $(x^{2}-2x)^2-2(2x-x^2)+1=(x-1)^4$
= $(x-1)^4=0$
→ $x=1$.
@nieucacvan.