解方程(3-x)^2 = (3-2x)^2 + (4x/3)^2
问题描述:
解方程(3-x)^2 = (3-2x)^2 + (4x/3)^2
(3-x)^2 = (3-2x)^2 + (4x/3)^2
没打错,是三分之4χ
答
(3-x)^2 = (3-2x)^2 + (4x/3)^2
将平方拆开:9-6x+x^2 =9-12X+4x^2 +16x^2 /9
解得 X=54/43