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