求解

monicamomo

x^2 + 6x + q , what is the value of q ?
D
1) X^2 + 6x + q = x^2 + rx + r-2. some r is satisfied for this quotation. All variable X is satisfied for this
2) x^2 + 6x + Q = (x+m)(x+n) , some m and n is satisfied for this quotation. All variable X is satisfied for this


请问some r is satisfied for this quotation. All variable X is satisfied for this是什么意思?
[em00]

sherry

大致意思是 r 是常量，x 是变量，所以1）中 r=6, q=4
2)好像不成立，q=5，8 或9

qiqi

我的理解是无论R取什么值，变量X均满足此等式。

自尊宝

"some r is satisfied for this quotation",

= not all r is ...... r取某个值才行

yinyanwu0188

I agree with Sherry!!

xulingyan

？我觉得A应该成立啊，哪位解释详细点