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1. (2, x+2) direct proportional (x-2,5)

2. (2, x+2) invers proportional (x-2,5)

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1. (2, x+2) direct proportional (x-2,5), ⇒2/(x-2)=(x+2)/5, ⇒(x-2)·(x+2)=2·5, ⇒ x²-2²=10, ⇒ x²=14, ⇒ x=±√14.

2. (2, x+2) invers proportional (x-2,5), ⇒ 2·(x-2)=(x+2)·5, ⇒ 2x-4=5x+10, ⇒-4-10=5x-2x, ⇒3x=-14, ⇒ x=-14/3.

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