# Equivalence in practice

**before**watching the video.In any case, you will find below a PDF file with the solution.

### Exercise 1.

Solve the equation \(\dfrac 1x+\dfrac{x+\frac 32}{x+1}=0\).### Exercise 2. [Solved only in the PDF file]

Solve the equation \(\dfrac{x^4-2x^2-2x+3}{x^2-2x+1}=1\).### Exercise 3. [Solved only in the PDF file]

Solve the equation \((y+7)^2=y^2\).### Exercise 4. [Solved only in the PDF file]

Solve the equation \(\dfrac 1{x^2}+\dfrac{2x-1}{x^2-1}=0\).#### Precalculus: the Mathematics of Numbers, Functions and Equations

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