Answer:
4+12x^4
Step-by-step explanation:
4+(m+n)x^4 , when m=7 and n=5
4+((7)+(5))x^4
4+(7+5)x^4 *(7+5=12)*
4+12x^4
Hope it helps!
Answer:
[tex]4+12x^{4}[/tex]
Step-by-step explanation:
[tex]m = 7[/tex], [tex]n = 5[/tex]
[tex]4 + (m + n) x^{4}[/tex]
[tex]4 + (7 + 5) x^{4}[/tex]
[tex]4+12x^{4}[/tex]
