Помогите пожалуйста!
1) x^{2} +6х+5=0
2) x^{2} -1.8х-3.6=0
3) 4x^{2} -х-14=0

4) 2 x^{2}+х-3=0
5) 2 x^{2}-9х=35

х²+6х+5=0а=1 , b=6 , с=5D= b²-4ac  D= 36 -4*1*5 =36-20= 16D>0 два корня уравнения , √D= 4х₁, х₂ = (-b +- √D) /2ax₁= (-6-4)/2 =-10/2=-5x₂= (-6+4)/2 = -2/2=-1x² -1.8x -3.6 =0D= (-1.8)² - 4* 1* (-3.6) = 3.24 +14.4 = 17.64D>0  ,  √D= 4.2х₁= (1,8 - 4,2 ) / 2 =  2,4/2=1,2х₂= (1,8+4,2)/2 = 34х²-х-14=0D= (-1)² -4 *4 *(-14)=1+ 224=225D>0 , √D= 15x₁= (1-15)/(2*4)= 14/8= 1.75x₂= (1+15)/8= 16/8=22x²+x-3=0D= 1 -4*2*(-3) = 1+24=25D>0 , √D= 5x₁= (-1-5) /(2*2) = -6/4= -1.5x₂= (-1+5)/4 =12x²-9x=352x²-9x-35 =0D= 81 -4*2*(-35) =81+280=361D>0 , √D=19x₁= (9-19)/ (2*2) =-10/4=-2.5x₂= (9+19)/4 = 28/4=7