Solve #2+7+4(2-5)#?

2 Answers

#-3#

Explanation:

First you have to solve inside the parenthesis:
#2-5= -3#

Then you multiply it times #4#:
#4(-3)= -12#

and substitute

#2+7+(-12)= 2+7-12 = -3#

*Remember the hierarchy: parentheses, power and sqrt, multiplication and division, sum and subtraction

May 20, 2018

#-3#

Explanation:

Identify the number of terms first and then simplify each term to a single number. These are added or subtracted in the last step.

Within each term, do brackets first, then multiplication and division.

#" "color(green)(2) " "color(blue)(+ " "7)" "color(red)(+" "4(2-5))" "larr# there are #3# terms
#color(white)(wwwwwwwwwwwww.w)color(red)(darr)#
#=color(green)(2) " "color(blue)(+ " "7)" "color(red)(+" "4xx(-3))#
#color(white)(wwwwwwwwwww..w)color(red)(darr)#
#=color(green)(2) " "color(blue)(+ " "7)" "color(red)(-" "12)#

#=9" "color(red)(-" "12)#

#=-3#