標題:
How to solve (x)(x)-9x+14 ?
How to solve (x)(x)-9x+14 ? 更新: need steps plz
最佳解答:
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。
其他解答:
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.
How to solve (x)(x)-9x+14 ?
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發問:How to solve (x)(x)-9x+14 ? 更新: need steps plz
最佳解答:
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。
其他解答:
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.
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