Question

Cine stie dau coroana
$x^{2}$ - 5x+6=0
(x+3)+(3-9)=0
p,q pvp pxq

Answer 1

x^2-5x+6=0 <=> (x^2-3x)+(-2x+6)=0 <=> x(x-3)-2(x-3)=0 <=> (x-2)(x-3)=0 <=> x=2 sau x=3.