解决方案1:
×2 5 X +2 = 0
X = [-5±√(10 2 -4×2)] / 2
X =(-5±√17 )/ 2
X1 =(-5 +√17)/ 2,X2 = - (1 +√17)/ 2
解决方法2:
×2-2X- 2 = 0 (X-1)2 -3 = 0
(X-1)2 = 3
的x 1 =±√3
X1 = 1 +√3 ,X2 = 1 - √3
解决方案3:
(X-3)(X-4)= 5×
×2-7X 12 = 5×
×2-12X +12 = 0
(X-6)2 -36 +12 = 0
(X-6)2 = 24
X-6 =±2√6 X1 = 6 + 2√6,X2 = 6-2√6
解决方案4:
×2 +3 = 3(X +1)
×2 + 3 = 3×3
×2-3X = 0
X(X-3)= 0
X1 = 0,X2 = 3