Răspunsuri

2014-09-07T21:55:28+03:00
|3x-7|=8 Ridici la a doua:
(3x-7)^2=64
9x^2 -42x+49=64
9x^2-42x-15=0 Imparti la 3:
3x^2-14x-5=0
delta=b^2-4ac
delta=196+60=256
x1=(14+16)/2=15
x2=(14-16)/2=-1

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