Question

Решите два примера...
(2x-1)^2=0 и 5y^2+20y+20=0

Answer 1

(2x-1)^2=0
2x-1=0
2x=1
x=1/2
 5y^2+20y+20=0
5(y²+4y+4)=0
5(y+2)²=0
y+2=0
y=-2