Answer:
Let's solve the expressions step by step:
1. 4 x 5 - (2² - 2)
First, we need to calculate the value inside the parentheses:
2² = 2 x 2 = 4
Now we subtract 2 from 4:
4 - 2 = 2
Now we can substitute the value back into the original expression:
4 x 5 - 2 = 20 - 2 = 18
2. (18 ÷ 3) (3² - 7)
First, let's calculate the value inside the parentheses:
3² = 3 x 3 = 9
Now we subtract 7 from 9:
9 - 7 = 2
Now we can substitute the value back into the original expression:
18 ÷ 3 x 2 = 6 x 2 = 12
Therefore, the final result is:
4 x 5 - (2² - 2) = 18
(18 ÷ 3) (3² - 7) = 12