Question

Resolva mentalmente. ???????
A- x²-5x+6=0
B- x²-6x+8=0
C- x²-x-13=0
D- x²-x-20=0
E- x²-12x+20=0

Answer 1

Quer mentalmente?jae! 
A = {3e2}
B ={4e2}
C={27e-26}
D={5e-4}
E={10e2}