4(x-1)2-9(2-x)2=0

问题描述:

4(x-1)2-9(2-x)2=0

4(x-1)2-9(2-x)2=0[2(x-1)]2-[3(2-x)]2=0则:[2(x-1) +3(2-x)][2(x-1) -3(2-x)]=0整理得到:(4-x)(5x-8)=0即 (x-4)(x-8/5)=0所以 x1=4 x2=8/5希望能帮到你,