Answer:
-5/3 and -1
Step-by-step explanation:
I am not sure what you mistake is, but here is my solution. I hope that it helps. I am sorry that you are frustrated. We have all been there.
Solution is x = 8.
2 is not a solution as √2*2 - 2 is not equal to -4.
Supplier B would cost $625 more than supplier A.