Completing the squares tells us exactly what square root we will need to calculate our answer.
Using the formula below you can find these answers:

Does this make sense?
1. 40m^2 2.150ft^2 3.99in^2 4.70m^2
Answer:
the answer is 72 square feet
Step-by-step explanation:
(5×4)+(5×5)+(5×3)+(12)=72
S= 13/5 is the answer
I hope it’s help u !