Solution
for this case we can do the following multiplicating the two terms
[tex]7x(5x^2)+7x(9x)+7x(6)+4(5x^2)+4(9x)+4(6)[/tex]
If we multiply we got:
[tex]35x^3+63x^2+42x+20x^2+36x+24[/tex]
And if we simplify we got:
[tex]35x^3+73x^2+78x+24[/tex]
x 5x^2 9x 6
7x 35x^2 63x^2 42x
4 20x^2 36x 24
