选用恰当的方法解方程4(χ-1)²-9(2χ-1)²=0
问题描述:
选用恰当的方法解方程4(χ-1)²-9(2χ-1)²=0
答
[2(x-1)]²-[3(2x-1)]²=0
[2(x-1)+3(2x-1)][2(x-1)-3(2x-1)]=0
(8x-5)(-4x+1)=0
x=5/8,x=1/4