16x²+9y²+4z²+24xy+12yz+16zx. factorise
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36
Use the identity of (a+b+c)² =a²+b²+c²+2ab+2bc+2ca
(4x)²+(3y)²+(2z)²+2(4x)(3y)+2(3y)(2z)+2(2z)(4x)
(4x+3y+2z)² is the answer...
(4x)²+(3y)²+(2z)²+2(4x)(3y)+2(3y)(2z)+2(2z)(4x)
(4x+3y+2z)² is the answer...
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10
(4x square+3y square+2z square)
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