(x-1)(x+3)=12

2007-05-15 12:47 am

(x-1)(x+3)=12
算式+答案

回答 (7)

2007-05-15 12:51 am

✔ 最佳答案

(x-1)(x+3)=12
x²+2x-3=12
x²+2x-15=0
(x-3)(x+5)=0
x=3 or -5

參考: By CY

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2007-05-18 2:55 am

(x-1)(x+3)=12
x^2 -x+3x-3=12
x^2+2x-15=0
(x-3)(x+5)=0
x=3

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2007-05-15 1:13 am

x²+2x-3=12
x²+2x-15=0
(x-3)(x+5)=0
x=3 or -5

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2007-05-15 1:10 am

(x-1)(x+3)=12
x²+2x-3=12
x²+2x-15=0
(x-3)(x+5)=0
x=3 or =5

參考: myself

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2007-05-15 12:55 am

(x-1)(x+3)=12
x^2-x+3x-3=12
x^2+2x-15=0
(x-3)(x+5)=0
x-3=0 or x+5=0
x=3 or x= -5

Ans:x等於3或-5。

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2007-05-15 12:53 am

(x-1)(x+3)=12
x^2 -x+3x-3=12
x^2+2x-15=0
(x-3)(x+5)=0
x=3 or
= -5

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2007-05-15 12:52 am

(x-1)(x+3)=12
x^2 -x+3x-3=12
x^2+2x-15=0
(x-3)(x+5)=0
x=3 or = -5

參考: me

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