因式分解 (x^2y^2+1)-4x^2y^2

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因式分解(x^2y^2+1)-4x^2y^2因式分解(x^2y^2+1)-4x^2y^2因式分解(x^2y^2+1)-4x^2y^2(x^2y^2+1)-4x^2y^2=(x^2y^2+1-2xy)(

因式分解 (x^2y^2+1)-4x^2y^2
因式分解 (x^2y^2+1)-4x^2y^2

因式分解 (x^2y^2+1)-4x^2y^2
(x^2y^2+1)-4x^2y^2
=(x^2y^2+1-2xy)(x^2y^2+1+2xy)
=(xy-1)^2(xy+1)^2