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Rezorvati ecuatia x(x-5)+8=(x+4)(x-4)-3(x-4)

Răspuns :

x^2-5x+8=x^2-16-3x+12
x^2-5x+8=x^2-3x-4 |-x^2
-5x+8=-3x-4
5x-3x=8+4
2x=12
x=12/2
x=6