Expand x2+4y2+36z2+4xy-24yz-12xz
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Step-by-step explanation:
x² + 4y² + 36z² + 4xy - 24yz - 12xz
this is in the form x² + y² + z² + 2(xy + yz + zx)
x² + (2x)² + (6z)² + 2(2×1 + 2×-6 + -6×1)
= (x+2y-6)²
MARK AD BRAINLIEST
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