Hi

Simplifying by combining like terms

(-3x^3-9x^2-5)-(-7x^2-6x-2)

1*(-3x^3-9x^2-5) -1*(-7x^2-6x-2)

  -3x^3 -9x^2 -5 + 7x^2 + 6x + 2

  -3x^3 -2x^2 + 6x - 3



 

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