factorise 4x square+9ysquare +16zsquare
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4x^2+9y^2+16z^2=
2(6xy+12yz+8zx)=
4(3xy+6yz+4zx)
2(6xy+12yz+8zx)=
4(3xy+6yz+4zx)
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please open the photo
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