Question

Rozwiąż równanie 3(x-1)(x+2)-2x(x-1)(x+3)=0 odp. podana w podr. to ,

Answer 1

3(x-1)(x+2)-2x(x-1)(x+3)=0 
(x-1)[3(x+2)-2x(x+3)]=0
x-1=0 i  3(x+2)-2x(x+3)=0
x=1        3x+6-2x^2-6x=0
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                        -2x^2-3x +6=0
                     delta=9+48=57
x1=3-v57 / -4=-3+v57 /4
x2=-3-v57 /4
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