Question

x^2-10x-3=0就是这个方程,我知道大家觉得很简单,

Answer 1

x ² + 10 x - 3 = 0

x ² + 10 x + 25 = 3 + 25

x ² + 2 · 5 x + 5 ² = 28

（x + 5）² = 4 × 7

x + 5 = ± √（2 ² × 7）

x = ± 2√7 - 5

x1 = 2√7 - 5

x2 = - 2√7 - 5