Question

Factorise:
$x {}^{2} + 4y {}^{2} + 9z {}^{2} - 4xy + 12yz - 6zx$
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Answer 1

Step-by-step explanation:

x2 +4y2+9z2-4xy+12yz-6zx

=(x)2+(2y)2+(3z)2 -2*x*2y+2*4y*3z-2*3z*x

=(-x+2y+3z)2

=(-x+2y+3z)(-x+2y+3z)

Answer 2

I don't know

I don't know