If the square of X + 2x-1 = 0, then the value of the square of the algebraic expression 2x + 4x-1 is

If the square of X + 2x-1 = 0, then the value of the square of the algebraic expression 2x + 4x-1 is


∵x²+2x-1=0
∴x²+2x=1
2x²+4x-1
=2(x²+2x)-1
=2×1-1
=1