Need help with Algebra - Question 1 - Please show work details!

Algebra
Tutor: None Selected Time limit: 1 Day

Sep 12th, 2015

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r^2 - 4r +2  for r= -4

substitute r=-4   in   r^2 - 4r +2

                        =   ( -4)^2-4(-4) +2

                        = 16 -4(-4) +2

                        = 16 + 16 +2

                         = 34...........................answer


answer is 

34



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Sep 12th, 2015

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Sep 12th, 2015

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