Step-by-step explanation:
(x + 2y - z)²
(x + 2y - z)(x + 2y - z)
x² + 2xy - xz + 2xy + 4y² - 2yz - xz - 2yz + z²
x² + 2xy + 2xy - xz - xz + 4y² - 2yz - 2yz + z²
z² + 4xy - 2xz + 4y² - 4yz + z²
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Step-by-step explanation:
(x + 2y - z)²
(x + 2y - z)(x + 2y - z)
x² + 2xy - xz + 2xy + 4y² - 2yz - xz - 2yz + z²
x² + 2xy + 2xy - xz - xz + 4y² - 2yz - 2yz + z²
z² + 4xy - 2xz + 4y² - 4yz + z²
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