① 3x²-√2 x=0
3x(x-√2)=0
x=0或x=√2
② 2/3x²-0.5=0
2/3x²=0.5
x²=0.5÷(2/3)
x²=3/4
x=±√3/2
③(2x+3)²=25
2x+3=5或2x+3=-5
x=1或x=-4
④ x²+2x-48=0
(x+8)(x-6)=0
x=-8或6
① 3x²-√2 x=0
3x(x-√2)=0
x=0或x=√2
② 2/3x²-0.5=0
2/3x²=0.5
x²=0.5÷(2/3)
x²=3/4
x=±√3/2
③(2x+3)²=25
2x+3=5或2x+3=-5
x=1或x=-4
④ x²+2x-48=0
(x+8)(x-6)=0
x=-8或6