Răspunsuri

2014-11-13T10:08:37+02:00
A(x) = (x - 3)^2 - 2x + 3
       = x^2 - 2*x*3 + 3^2 - 2x + 3
       = x^2 - 6x + 9 - 2x + 3
       = x^2 - 6x  - 2x + 12
       = x(x - 6) - 2(x - 6)
       = (x - 6)(x - 2)

A(x) = (x - a)(x - b)
-------------------------------------------------------
=> a = 6, b = 2

<=> a + b + a*b = 6 + 2 + 6*2 = 8 + 12 = 20