jesli wiadomo ze liczby x1 x2 sa roznymi rozwiazaniami rownania 2x2 + 2x - 7=0 to ile wynosi x1+ x2
x1 + x2 = -b / a = -2 / 2 = -1
x1+x2=b/b=2/2= -1
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x1 + x2 = -b / a = -2 / 2 = -1
x1+x2=b/b=2/2= -1