factorise each of the following: 4x^2+9y^2+16z^2+12xy-24yx-16xz
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Explanation:
=(2x)^2+(3y)^2+(4z)^2+(2y)(3x)+2(3y)(-4z)+2(-42)(2x)
(2x+3y-4z)^2
(2x+3y-4z)(2x+3y-4z)
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