16(3x+2)的平方=25(2x-3)的平方16(3x+2)的平方-25(2x-3)的平方=0[4(3x+2)+5(2x-3)][4(3x+2)-5(2x-3)]=0(22x-7)(2x+23)=0x1=7/22x2=-23/2
因式分解法:16(3x+2)^2=25(2x-3)^2移项得:16(3x+2)^2-25(2x-3)^2=0[4(3x+2)+5(2x-3)][4(3x+2)-5(2x-3)]=0化简得:(22x-7)(2x+23)=022x-7=0 2x+23=0x1=7/22 x2=-23/2
16(3x+2)�0�5=25(2x-3)�0�54(3x+2)=5(2x-3) 4(3x+2)=-5(2x-3)12x+8=10x-15 12x+8=-10x+152x=-23 22x=7x=-23/2 x=7/22
由16(3x+2)^2=25(2x-3)^2得16/25=(2x-3/3x+2)^2 所以交叉乘后得10x-15=12x+8 x=-23/2