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Mathematics 9 Online
OpenStudy (anonymous):

how to solve thisssssssss

OpenStudy (ivettef365):

The first one is (x+y+z)(x+y+z) = x^2 +xy+xz+xy+y^2+yz+zx+zy+z^2) = x^2+2xy+2xz+y*2+2zy+z^2)

OpenStudy (ivettef365):

The other one is (3xy+3yz+3zx)

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