Answer:
After making the subtract the answer is -13.
Step-by-step explanation:
In this case the question is a subtract, we just have to subtract both of the equations, this is:
[tex]-8+b^{2} -(5+b^{2} )\\=-8+b^{2} -5-b^{2} \\=-13[/tex]
After making the subtract the answer is -13.