Question

Qual o polinômio que expressa a soma entre x²-9x + 5 e 3x² + 7X -1?

Answer 1

$(x^2-9x+5)~+~(3x^2+7x-1)~=\\\\\\=~(x^2+3x^2)~+~(7x-9x)~+~(5-1)\\\\\\=~(4x^2)~+~(-2x)~+~(4)\\\\\\=~\boxed{4x^2-2x+4}$