Respuesta :

emily000090

Answer:

7. 8x^2 + 3y^2

8. 9y^4 -- 8x

9. 5x^2- 2x- 3

Step-by-step explanation:

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7 is 6x^2 + 3y^2
8 is 9y^4 - 8x
9 is 5x^2 - 2x - 3