alexxxxx25 alexxxxx25

08-10-2015
Mathematics

contestada

(x-2)(x+1)=3x-4
solve

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crisforp crisforp

08-10-2015

x^2 + x - 2x - 2 = 3x - 4
x^2 - x - 2 = 3x - 4
x^2 - x - 3x - 2 + 4 = 0
x^2 - 4x + 2 = 0 ;
is the quadratic formula ;
a = 1 ; b = -4 ; c = + 2 ;
The solutions are ( - 1 + [tex]2 \sqrt{3} [/tex]) / 2 and ( - 1 - [tex]2 \sqrt{3} [/tex]) / 2 ;

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