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gghhytjutk
2 tháng trước

giải phương trình xx−2=x−2x−3

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DYNAMONSWORLD
2 tháng trước

Đáp án:

 xx−2=x−2x−3 (ĐK: x ≠ 2;3)

⇔x.(x−3)(x−2).(x−3)=(x−2).(x−2)(x−2).(x−3)

⇒ x²-3x=x²-4x+4

⇔ x²-3x-x²+4x-4=0

⇔ x-4=0

⇔ x=4

\text{Vậy S={4}}

 

traihonguyenl6c
2 tháng trước

\frac{x}{x-2}=\frac{x-2}{x-3}

(ĐKXĐ : x \ne 2,3)

⇒x(x-3)=(x-2)²

⇔x²-3x=x²-4x+4

⇔x=4 (t/m đkxđ)

Vậy nghiệm của PT là x=4

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3 lượt xem
1 đáp án
3 giờ trước

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2 lượt xem
1 đáp án
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