Probier mal die Lösung mithilfe der App
https://photomath.net/de/
e)
1/3·x^2 + x = 4/3·x
x^2 + 3·x = 4·x
x^2 - x = 0
x(x - 1) = 0
x = 0 ∨ x = 1
g)
4.5·x^2 - 9·x - 14 = 0
9/2·x^2 - 9·x - 14 = 0
x^2 - 2·x - 28/9 = 0
x = 1 ± √37/3
x = 3.028 ∨ x = -1.028
h)
12.1·x^2 + x = x^2
11.1·x^2 + x = 0
x·(11.1·x + 1) = 0
x = -1/11.1 ∨ x = 0
x = -0.09009 ∨ x = 0