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Answers
Answered by
2
Answer:
x² + 4y² +z²- 4xy + 4yz - 2zx
Step-by-step explanation:
=(x-2y-z)²
=(a+b+c)²= a²+b²+c²+2(ab+bc+ca)
=(x+(-2y)+(-z))² = [x²+(-2y)²+(-z)²+2((x.-2y) + (-2y.-z)+(-z.x))]
=[x² + 4y² + z² + 2( -2xy + 2yz - zx)]
=[x² + 4y² + z² - 4xy + 4yz - 2zx]ans.
Answered by
0
(2x-2y*2-2z)
(2x-4y-2z)
2x-4y-2z
Ans= 2x-4y-2z
(2x-4y-2z)
2x-4y-2z
Ans= 2x-4y-2z
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