(1) 5x²-10=0
x²=2
x²=(±√2)²
x=-√2,x=√2
(2) 36(x-3)²-25=0
(x-3)²=25/36
(x-3)²=(±5/6)²
x-3=±5/6
x=3±5/6
x=13/6,x=23/6