Answer:
[tex]9x + 4 - 3y^2[/tex]
Step-by-step explanation:
Given
[tex]5x+4x - 1+3 - 7y^2 +2+4y^2[/tex]
Required
Simplify
[tex]5x+4x - 1+3 - 7y^2 +2+4y^2[/tex]
Collect Like Terms
[tex]5x+4x - 1+3 +2+4y^2- 7y^2[/tex]
Simplify like terms
[tex]9x + 4 - 3y^2[/tex]
Hence,
[tex]5x+4x - 1+3 - 7y^2 +2+4y^2[/tex] [tex]= 9x + 4 - 3y^2[/tex]