来自邵建龙的问题
解方程:3x(x+5)²-2(3-x)²+(9-x)(9+x)=0刚才打错了:3(x+5)²-2(3-x)²+(9-x)(9+x)=0
解方程:3x(x+5)²-2(3-x)²+(9-x)(9+x)=0
刚才打错了:3(x+5)²-2(3-x)²+(9-x)(9+x)=0
1回答
2020-05-15 01:44
解方程:3x(x+5)²-2(3-x)²+(9-x)(9+x)=0刚才打错了:3(x+5)²-2(3-x)²+(9-x)(9+x)=0
解方程:3x(x+5)²-2(3-x)²+(9-x)(9+x)=0
刚才打错了:3(x+5)²-2(3-x)²+(9-x)(9+x)=0
3x(x+5)²-2(3-x)²+(9-x)(9+x)=0
3x(x^2+10x+25)-2(9-6x+x^2)+(81-x^2)=0,
3x^2+30x+75-18+12x-2x^2+81-x^2=0,
x=-23/7