1.

B) 9x2 + 25y2 + 4z2 - 30xy - 20yz + 12zx​

Answer»

-step explanation:using formulawe getHello DEAR my self RAVI GUPTA from Ayodhya Uttar PradeshFor free PDF eBook you can subscribe our official YouTube channelhttps://www.youtube.com/channel/UCKAGyIO1nKysmccL9_apamwmy email address - [email protected]and my whatsapp NUMBER - 6388044617only urgent message



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