解方程3【2x+1】【2x-1】-2【3x+2】【2-3x】-25²=-6
问题描述:
解方程3【2x+1】【2x-1】-2【3x+2】【2-3x】-25²=-6
答
3【2x+1】【2x-1】-2【3x+2】【2-3x】-25²=-6
3【2x+1】【2x-1】+2【3x+2】【3x-2】-25²=-6
3(4x²-1)+2(9x²-4)-25²=-6
x=±√21用平方差来解3【2x+1】【2x-1】-2【3x+2】【2-3x】-25²=-63【2x+1】【2x-1】+2【3x+2】【3x-2】-25²=-63(4x²-1)+2(9x²-4)-25²=-630x²=630x²-21=0(x+√21)(x-√21)=0x=±√21