解方程组:(1)1/2*(5-5X)^2=50(X+1)^2 (2)X^2-4=2(2X-X^2)+3

问题描述:

解方程组:(1)1/2*(5-5X)^2=50(X+1)^2 (2)X^2-4=2(2X-X^2)+3

(1)1/2*(5-5X)^2=50(X+1)^2
(5-5x)^2=100(x+1)^2
5-5x=10(x+1),或者5-5x=-10(x+1)
解得:x1=-1/3 x2=-3
(2)X^2-4=2(2X-X^2)+3
x^2-4=4x-2x^2+3
3x^2-4x-7=0
(x+1)(3x-7)=0
x1=-1 x2=-7/3