4X^2+4+8X-36X^2-9+36X=0
-32X^2-5+44x=0
32X^2-44x+5=0
(4x-5)(8x-1)=0
解得x=5/4 , 1/8
4(X+1)^2-9(2X-1)^2=0
[2(x+1)]^2-[3(2x-1)]^2=0
(2x+2)^2-(6x-3)^2=0
(2x+2-6x+3)(2x+2+6x-3)=0
(5-4x)(8x-1)=0
5-4x=0或8x-1=0
x=5/4或x=1/8
看你那么好学,真的想弄懂,而不是答案。就写详细点吧
[2(x+1)]^2-[3(2x-1)]^2=0
平方差公式: [2(x+1)-3(2x-1)]*[2(x+1)+3(2x-1)]=0
=>>> (-4x+4)(8x-1)=0 =>(x-1)(8x-1)=0
则有:x-1=0, x=1;
8x-1=0 x=1/8