How do you evaluate #1- ( - 1) ^ { 3} - 3^ { 2} \cdot ( - 2)#?

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Answer 1 · 2018-04-30T21:06:30

20

#1-(-1)^3-3^2.(-2)#

#=1-(-1)-9xx-2#

#=1+1+18#

#=20#

Answer 2 · 2018-04-30T21:14:44

#20#

Count the number of terms first and simplify each one separately.

#color(blue)(1)" " color(red)(-(-1)^3)" "color(green)( -3^2 xx (-2))" "larr# there are #3# terms

#=color(blue)(1)" " color(red)(-(-1)" "color(green)( -9 xx (-2))#

#=color(blue)(1)" " color(red)(+1)" "color(green)(+18)#

#=20#