Question

1) 10x^2=0
2) (x+3)(x+7)=0

Answer 1

1)
10x^2 = 0 
x^2 = 0 
x = 0


2) 
(x + 3) ( x + 7) = 0 

x + 3 = 0 
x = - 3 

x+ 7 = 0 
x = - 7