Respuesta :

TheSandman1337
We have that:
[tex](7x+5)(2x^3-4x^2+9x-3)=[/tex]
[tex]7x(2x^3-4x^2+9x-3)+5(2x^3-4x^2+9x-3)[/tex]
[tex]=(14x^4-28x^3+63x^2-21x)+(10x^3-20x^2+45x-15)[/tex]
Now we add monomials of the same grade and we get:
[tex]14x^4-18x^3+43x^2+24x-15[/tex]
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