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Mathematics 20 Online
OpenStudy (anonymous):

Checking answer: (7x^3 -6x^2 +6) - (2x^2 -4x -9) = 7x^3 -6x^2 +6 -2x^2 +4x +9 = 7x^3 -6x^2 -2x^2 +4x +6+9 = 7x^3 (-6-2)x^2 +4x (6+9) = 7x^3 -8x^2 +4x+15 Thank you!

OpenStudy (anonymous):

right

OpenStudy (anonymous):

Thank you!

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