(x – y –z)² + (x + y + z)² please solve I will mark the good answer Brainliest
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Answer:
2x²+2(y+z)²
Step-by-step explanation:
(x – y –z)² + (x + y + z)²=
= x² + y² + z² - 2xy + 2yz - 2zx + x² + y² + z² + 2xy + 2yz + 2zx=
= 2x² + 2y² + 2z²+ 4yz=
= 2x²+2(y+z)²
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