问题
解答题
9(x-2)2-16(x+1)2=0.
答案
[3(x-2)-4(x+1)][3(x-2)+4(x+1)]=0,
3(x-2)-4(x+1)=0或3(x-2)+4(x+1)=0,
解得x1=-10,x1=
.2 7
9(x-2)2-16(x+1)2=0.
[3(x-2)-4(x+1)][3(x-2)+4(x+1)]=0,
3(x-2)-4(x+1)=0或3(x-2)+4(x+1)=0,
解得x1=-10,x1=
.2 7