4x^2+ 1/4 -9y^2 -2x

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4x^2+1/4-9y^2-2x4x^2+1/4-9y^2-2x4x^2+1/4-9y^2-2x4x^2+1/4-9y^2-2x=(2x-1/2)^2-9y^2=(2x-1/2+3y)(2x-1/2-

4x^2+ 1/4 -9y^2 -2x
4x^2+ 1/4 -9y^2 -2x

4x^2+ 1/4 -9y^2 -2x
4x^2+1/4-9y^2-2x=(2x-1/2)^2-9y^2=(2x-1/2+3y)(2x-1/2-3y)