Your questions about adding polynomials

Charles asks…Adding Polynomials?n^2+4n+3 + 3n^2+4n-4

okay. is the answer
3n^2+8n-1
or
3n^4+8n-1

and how do you subtract polynomials?
mhm. and how do you do this one
2x^2+3xy-y^2 +2x^2-2xy-4y^2Cary answers:n^2+4n+3 + 3n^2+4n-4
1n² + 3n² + 4n + 4n + 3 - 4
4n² + 8n - 1

To subtract polynomial, for example:

n² + 5n + 3

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