Question

Factorise x^2 +4y^2 + z^2 -4xy -2xz +4yz.

Answer 1

Answer:

(-x + 2y + z)²

Step-by-step explanation:

(x + y + z)² = x² + y² + z² + 2xy + 2yz + 2xz

x² + 4y² + z² - 4xy - 2xz + 4yz = (-x + 2y + z)²

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