You have to use PEMDAS:
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
First, do parentheses.
32 - 42 = -10
22 + -10 = 12
Answer = 12
Hope this helped
Have a great day :)
The third integer is 86, hope this helps :)
Since that is a triangle the expression would be b x h / 2. So 12*12 = 144 / 2 = 72. The answer is 72.
The correct answer should be :
Option 3 : 
Hope this helps,
Davinia.
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