Answer:
15[tex]x^{3}[/tex] ( [tex]x[/tex] + 1 )
Step-by-step explanation:
5[tex]x^{4}[/tex] + 10[tex]x^{4}[/tex] + 15[tex]x^{3}[/tex]
Simply the expression where there are like terms.
15[tex]x^{4}[/tex] + 15[tex]x^{3}[/tex]
15 and [tex]x^{3}[/tex] are common terms. Take them out and place the remaining inside the bracket.
15[tex]x^{3}[/tex] ( [tex]x[/tex] + 1 )
