Answer:
y = x^2 + 8x - 3
y = x^2 + 8x + (8/2)^2 - 3 - (8/2)^2
y = x^2 + 8x + 16 - 3 - 16
Step-by-step explanation:
1. minus 7 by 8
2.minus 3 by 4
3. minus 1 by 2
4. 5 by 8
5.1 by 4
8-10=-2
I did 8- 10 instead of 10-8 because that how you put it in the question. I hope this helps if not I'm truly sorry.