How do you evaluate #3a-2b# when #a=-4# and #b=-1#?

1 Answer
Mia
Oct 21, 2016

#-10#

Explanation:

We should know the multiplication of integers :
Multiplying integers same sign has a product of positive sign
Multiplying integers different signs has a product of negative sign

#3a-2b#
#=3*(-4)-2*(-1)#
#=-12+2#

Integers #-12# and #2# are of different we subtract and take the sign of the greater
#=-10#

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