I need help figuring out the problems below and finding the answer to the question of what each equilibrium is.

2) H + Br 2 HBr 2(g) 2(g) (g) -12 -2K = 2.000 x 10 ; Initial [H ] = 3.00 x 10 M 2 -2Initial [Br ] = 2.00 x 10 M 2 What is [all species] at equilibrium? 3) 2 HI H + I (g) 2(g) 2(g) -1 -2K = 1.000 x 10 ; Initial [HI] = 2.000 x 10 M What is [all species] at equilibrium?

the picture above shows the questions better. I need help finding the answer with the step by step leading to the quadratic equation.

2)H2(g)+Br2(g)2HBr(g)K=2.0001012;Initial[H2]=3.00102MInitial[Br2]=2.00102M What is [all species] at equilibrium? 3) 2HI(g)H2(g)+I2(g) K=1.000101; Initial [HI]=2.000102M What is [all species] at equilibrium