(x^2-y^2)z+(y^2-z^2)x Please factorise
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(x² - y²)z + (y² - z²)x
= zx² - zy² + xy² - xz²
= zx² - xz² + xy² - zy²
= xz(x - z) + y²(x - z)
= (x - z)(xz + y²)
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