How do you evaluate #2( 3- 7) #?

1 Answer
Mar 21, 2017

A different way of thinking about this

#-8#

Explanation:

7 can be split into #3+4#

So #color(red)(-7)# can be split into #color(red)(-3-4)#

Write #color(green)(2(3color(red)(-7)))" as "color(green)(2(3color(red)(-3-4)))#

but #color(green)(+3)color(red)(-3)=0#

#2(0-4)#

#2xx(-4)=-8#