> 数学 >
X(X+2)+1=9用因式分解法解
人气:490 ℃ 时间:2020-03-31 04:25:30
解答
x ² + 2 x + 1 = 9
(x + 1)² = 9
x + 1 = ± 3
x = ± 3 - 1
x1 = 3 - 1 = 2
x2 = - 3 - 1 = - 4
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版