Question

Решите уравнение х2-4√2х+8=0

Answer 1

D=(4√2)²-4*8=16*2-32=0
x=4√2/2=2√2

2 способ
х²-4√2х+8=0
х²-2√2х-(2√2х-8)=0
х(х-2√2х)-2√2(х-2√2)=0
(х-2√2)(х-2√2)=0
(х-2√2)²=0
х=2√2