1. x2-5,2x=0 2. 25-x2=0 3. (y+3) (y-2)= -6

Question

1. x2-5,2x=0
2. 25-x2=0
3. (y+3) (y-2)= -6

Answer 1

1. x2-5,2x=0
x(x-5,2)=0
x=0 и x-5,2=0
x=5,2
2. 25-x2=0
x2=25
x=5; -5
3. (y+3)(y-2)=-6
y2+3y-2y-6=-6
y2+y=0
y(y+1)=0
y=0 и y+1=0
y=-1