(x - y )(x + Y )+ (X - z )(y + Z) +( Z - x)( z + x )is equal to
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Answer:
(2x^2-Zz-yY)+(Xy-zZ)
Step-by-step explanation:
=(x-y) (x+Y) +(X-z) (y+Z) +(Z-x) (z+x)
=(x^2-yY)+(Xy-zZ)+(Zz-x^2)
=(2x^2-Zz-yY)+(Xy-zZ)
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