[30-(x-10)]² 等于几,紧急答
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/17 06:04:54
![[30-(x-10)]² 等于几,紧急答](/uploads/image/z/1629625-49-5.jpg?t=%5B30-%28x-10%29%5D%26%23178%3B+%E7%AD%89%E4%BA%8E%E5%87%A0%2C%E7%B4%A7%E6%80%A5%E7%AD%94)
x)66ը54ЌUS64VxɮtoYaSlT_`gC//FRg Uh0
Ӊ$Rkb$Rgka ff``_\gu
[QWYw=
Maӥ{j{O[</Q7IDka0@ ܍
[30-(x-10)]² 等于几,紧急答
[30-(x-10)]² 等于几,紧急答
[30-(x-10)]² 等于几,紧急答
解[30-(x-10)]^2
=[30-x+10]^2
=(40-x)^2
=(x-40)^2
=x^2-80x+1600
-xx-80x+1600
拆开算就好了,用公式(a-b)²=a²-2ab+b²
X²-80X+1600