1) x^2+10x+25=0 2) x(x-5)=-4

Question

1) x^2+10x+25=0
2) x(x-5)=-4

Answer 1

1)...
(x+5)^2=0
x+5=0
x=-5
2)...
x^2-5x+4=0
D=25-16=9>0
x1,2=(5+-3)/2=1;4