Question

Решите уравнение $x^{2}$-6х+9=0

Answer 1

x^{2} -6x+9=0
D=b^2-4ac=36-4*1*9=36-36=0
x_{1;2}= -frac{b}{2a}= - frac{-6}{2*1}=3 [/tex]