(x平方-9)除以(x-3)等于多少
问题描述:
(x平方-9)除以(x-3)等于多少
答
(x²-9)÷(x-3)
=(x+3)(x-3)÷(x-3)
=x+3
答
x*x-9=(x-3)*(x+3)
答
(x平方-9)除以(x-3)
=(x+3)(x-3)除以(x-3)
=x+3
不懂的欢迎追问,
答
原式=(x+3)(x-3)÷(x-3)
=x+3