How to solve (x)(x)-9x+14 ?

1 2
1 7

1X1 = 1
2X7 = 14

7+2=9

X² - 9X + 14
= (X - 2)(X - 7)

2013-10-09 01:18:19 補充：
請參考 Masterijk 在意見中的解說 : 抄錄如下 :

I want to clarify a point.

You can only SOLVE an equation or an inequality or a problem.

You cannot solve an expression.

Maybe you should ask how to FACTORIZE the expression.

2013-10-09 01:25:14 補充：
意思是說 : X² - 9X + 14 是一個表述式(expression)而不是一個方程(Equation)，因此，只可以做因式分解(FACTORIZE)，不能 solve。

即只可以寫

X² - 9X + 14 = (X - 2)(X - 7)

而不能 說 : X = 2 或 X = 7

但 X² - 9X + 14 = 0 則是一個方程，它可以求解(solve)，結果會是

X² - 9X + 14 = (X - 2)(X - 7) = 0 ; X = 2 或 X = 7

請留意它們的分別。

2013-10-09 01:29:50 補充：
Masterijk : 睇你發表的意見，得益不小。多謝，多謝。

If X =12...

12*12-9*12+14
----2
=12 -9*12+14

=144-108+14

=36+14

=50

If X=13...

13*13-9*13+14

=169-117+14

=52(13-9*13=52)+14

=66
-----------------2
(ANS) X -9*X+14
----2
=X -9X+14

=(X-9)*X+14
========


D - 唔駛理 (因為我部腦有D問題...)

I want to clarify a point.

You can only SOLVE an equation or an inequality or a problem.

You cannot solve an expression.

Maybe you should ask how to FACTORIZE the expression.