Equations in several variables in practice - The NON linear case

The following exercises are solved in this step.

We invite you to try to solve them before watching the video.

In any case, you will find below a PDF file with the solutions.

Exercise 4.

Solve the system (quadleftlbrace begin{array}{l} x+y=4 x^3+y^3=28 end{array} right. )

Exercise. 5 [Solved only in the PDF file]

Solve the following systems:

i) (quadleftlbrace begin{array}{l} x^2+y^2=13 xy=-6 end{array} right. )

ii) (quadleftlbrace begin{array}{l} sqrt{2-x}=y y+2=x end{array} right. )