Respuesta :

sqdancefan

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Answer:

  • 5y^2 +11y +2
  • x^2 +y^2 -4x +y -21

Step-by-step explanation:

1) (6y^2 + 4y + 5) – (3 – 7y + y^2) = 6y^2 +4y +5 -3 +7y -y^2

  = y^2(6 -1) +y(4 +7) +(5 -3)

  = 5y^2 +11y +2

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2) y^2 + y + (x – 7)(x + 3) = y^2 +y +x^2 -4x -21

  = x^2 +y^2 -4x +y -21

Answer:

5y^2 +11y +2

x^2 +y^2 -4x +y -21

Step-by-step explanation:

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