How do you evaluate #7( - 4) + 9( - 5)#?

1 Answer
Mar 10, 2018

Answer:

#-73#

Explanation:

First, get the multiple values of the terms (solve the two terms beside the mathematical operation)

#7(-4) = -28#

#9(-5) = -45#

Then add these two terms since both are negative values. and add the #-# sign in front of the answer because both the terms are negative.

#-28 + (-45) = -73#

#(-) + (-) =# add and put #(-)# infront of the answer.
#(-) + (+) =# subtract and put the sign of the highest term.

For example:

#(-4) + 6 = 2#

(here #6 > 4#. Since #6# has a #+# sign, we put a #+# sign for the answer)

#(-6) + 4 = -2 #

(here #6 > 4#. Since #6# has a #-# sign, we put a #-# sign for the answer)