TC = 2Q

If the total cost (in £s) function is given by ^{2 }+ 158Q - 12000

where Q is the quantity produced

(a) What Q would minimise total costs? Give your answer to 2 decimal places.(b) Use your value in (a) to find the minimum value for total costs. Give your answer to the nearest.

pound

If anyone could go through how to get the answer with me I would be extremely grateful.