Im so sorry.. I did not mean to submit an answer..
And I honestly don't know how to get rid of my answer.. but I will try to help.
4x²- 20x=0 = [tex]x_{1}[/tex] = -√5, [tex]x_{2}[/tex] = √5
3x²-42=0 = [tex]x_{1}[/tex] = -√14, [tex]x_{2}[/tex] = √14
2x²-14x=0 = [tex]x_{1}[/tex] = 0, [tex]x_{2}[/tex] = 7
8x²-98=0 = [tex]x_{1}[/tex] = -[tex]\frac{7}{2}[/tex], [tex]x_{2}[/tex] = [tex]\frac{7}{2}[/tex]
I hope that these are the answers that you wanted, if they are not, I am sorry, tell me and I will try to fix them.
