Answer:
[tex]-4x^{2} -11x+13[/tex]
Step-by-step explanation:
Step to add the integers.
When we add two positive integers,we add integers and +sign is used.
When we dd two positive integers, we add subtract integers, and greater integer sign is used.
When we add two negative integer, we add integers and -sign is used.
=([tex]-x^{2} +9^{}[/tex])+([tex]-3x^{2} -11x^{} +4^{}[/tex])
=[tex]-x^{2} +9-3x^{2} -11x+4[/tex]
=[tex]-x^{2} -3x^{2} -11x+9+4[/tex]
=[tex]-4x^{2} -11x+9+4[/tex]
=[tex]-4x^{2} -11x+13[/tex]
