Answer:
[tex]a+b+c=32[/tex]
Step-by-step explanation:
we have
[tex](-2x^{2} +x+31)+(3x^{2}+7x-8)[/tex]
Adds the terms
Group terms that contain the same variable
[tex](-2x^{2}+3x^{2})+(x+7x)+(31-8)[/tex]
Combine like terms
[tex](x^{2})+(8x)+(23)[/tex]
where
[tex]a=1,b=8,c=23[/tex]
therefore
[tex]a+b+c=1+8+23=32[/tex]
