Answer:
7,225
Step-by-step explanation:
find 85^2 using mental math
\(85^2 = 85 * 85\)
85 can be written as 80 +5
\((80+5)(80+5)\)
Multiply each term inside the parenthesis
Multiply 80 with 80 +5 and then we multiply 5 with 80 +5
It becomes
\(6400 + 400+400+ 25\)
Now we add all the numbers
7,225
