subtract: (4b-8b+11) -(-2b -4b +5). There is a small 2 above the 4b in the first equation. There is a small 2 above the b in the second equation.

We are asked to solve the following subtraction:
[tex]\mleft(4b^2-8b+11\mright)-\mleft(-2b^2-4b+5\mright)[/tex]First we will change the sign inside the second parenthesis:
[tex]\mleft(4b^2-8b+11\mright)+\mleft(2b^2+4b-5\mright)[/tex]Now we will associate like terms:
[tex](4b^2+2b^2)+(-8b+4b)+(11-5)[/tex]Now we add the associated terms;:
[tex]6b^2-4b+6[/tex]And thus we get the answer.