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rezolvati ecuatiile: 2x²+x-3=0 ; 2x²-x-15=0 ; 3x²-5x+2=0

Răspuns :

Răspuns:

2x²+x-3=0

(x+3)(x-2)=0

x+3=0

x=-3

2x²-x-15=0

(x-6)(x+5)=0

x-6=0

x=6

3x²-5x+2=0

(x-3)(x-2)=0

x-3=0

x=3