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2014-06-01T20:17:47+03:00
(x+1)² -(x-2)²=4x-5

[(x+1)-(x-2)][(x+1)+(x-2)]= 4x-5

(x+1-x+2)(x+1+x-2)= 4x-5

3(2x-1)=4x-5

6x-3=4x-5

6x-4x =-5+3

2x = -2

x= -1
1 5 1