Question

if x²+4y²+9z²-4xy-12yz+6xz=0
a)x=2y-3z b)x=y-3z c)2x=y-3z d)x=3y-2z

Answer 1

EXPLANATION.

⇒ x² + 4y² + 9z² - 4xy - 12yz + 6xz = 0.

As we know that,

Formula of :

⇒ (x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx.

Using this formula in the equation, we get.

⇒ x² + (2y)² + (3z)² - 2(2xy) - 2(6yz) + 2(3xz) = 0.

⇒ (x - 2y + 3z)² = 0.

⇒ x - 2y + 3z = 0.

⇒ x = 2y - 3z.

Option [A] is correct answer.

Answer 2

Answer:

OPT=A

Step-by-step explanation:

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