How do you evaluate #[8\cdot 2- ( 3+ 9) ] + [ 8- 2\cdot 3]#?

1 Answer
Jan 11, 2017

#6#

Explanation:

This needs to be calculated using the correct order of operations.

Parentheses first

#[8xx2 - color(red)((3+9))] + [8-2xx3]#

Multiplication and division are done before addition and subtraction.

#=[color(blue)(8xx2) - color(red)(12)] + [8-color(blue)(2xx3)]#

#=[color(blue)(16) - 12] + [8-color(blue)(6)]#

#=" "4" + " "2#

#=6#