Photos 3Х 9 4Х

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3х 9 4х. 4х/2-4ху+у/2-8х+4у-3. Х2+6ху+9у2. У4 + 9х2 + 6ху2. Х+4/ху-х2+у+4/ху-у2.
4х/2-4ху+у/2-8х+4у-3. Х2+6ху+9у2. У4 + 9х2 + 6ху2. Х+4/ху-х2+у+4/ху-у2.

See also