Question

Найдите корни уравнения (2,5y-4)(6y-1,8)=0

Answer 1

$\left[\begin{array}{ccc}2.5y-4=0\\6y-1.8=0\end]$
$\left[\begin{array}{ccc}y=1.6\\y=0.3\end]$

Answer 2

(2,5у-4)(6y+1,8)=0
2,5у-4=0
2,5у=0+4
2,5у=4
у=4:2,5
у=1,6 

Корни: 1,6 ; 0,3