4(x-1)²=25(x+1)²
[2(x-1)]²=[5(x+1)]²
则:
2(x-1)=5(x+1),得:x=-7/3;
或者:
2(x-1)=-5(x+1),得:x=-3/7
则:
x=-7/3或x=-3/7
4(x-1)²=25(x+1)²
4(x-1)²-25(x+1)²=0
[2(x-1)+5(x+1)][2(x-1)-5(x+1)]=0
(7x+3)(-3x-7)=o
即(7x+3)(3x+7)=0
所以7x+3=0或3x+7=0
即x1=-3/7 x2=-7/3
4(x-1)²=25(x+1)²
(2x-2)^2-(5x+5)^2=0
(2x-2+5x+5)(2x-2-5x-5)=0
(7x+3)(-3x-7)=0
7x+3=0或-3x-7=0
x=-3/7或x=-7/3
4(x-1)²=25(x+1)²
(2x-2)²=(5x+5)²
那么2x-2=5x+5,或2x-2=-(5x+5)
2x-5x=5+2,或2x+5x=-5+2
-3x=7,或7x=-3
所以x=-7/3,或x=-3/7
原方程即:(2(x-1))^2=(5(x+1))^2
两边同时开根号可得:2(x-1)=5(x+1)或2(x-1)=-5(x+1),然后解得x1=-7/3,x2=-3/7