f(x) = g(x)
=> (x+1)x = 2
=> x^2+x = 2
=> x^2+x -2 = 0
=> d : b^2- 4 * a *c
=> d = 1^2-4*1*(-2)= 1 + 8 =9
x1,2 = -b + sau - √ d/2a = -1 + 3 / 2 = 2/2 =1
= -1 - 3 /2 = -4 / 2 = -2
f(x) = y => 1 + 1 = y => y=2
g(x) = y => -2 + 1 = y => y = -1
x1 =1 , x2= -2
y1 = 2, y2 = -1
