2x(x+5)^2−x^2(x+5)=0

2x(x+5)²-x²(x+5)=0

2x(x²+10x+25)-x³-5x²=0

2x³+20x²+50x-x³-5x²=0

x³+15x²+50x=0

x(x²+15x+50)=0

x(x²+10x+5x+50)=0

x(x+10)(x+5)=0

x=0, x+10=0, x+5=0

x=0, x= -10, x= -5