Graph the line given by x+y=-2 and the quadratic curve given by y=x²-4. Find all solutions to the system of equations. Verify your result both algebraically and graphically.

Answer :

Answer:

(1,-3) and (-2,0)

Step-by-step explanation:

[tex]x+y=-2[/tex]

[tex]y=x^2-4[/tex]

Applying the second equation to the first

[tex]x+x^2-4=-2\\\Rightarrow x+x^2-4+2=0\\\Rightarrow x^2+x-2=0[/tex]

Solving the equation we get

[tex]x=\frac{-1+\sqrt{1^2-4\cdot \:1\left(-2\right)}}{2\cdot \:1}, \frac{-1-\sqrt{1^2-4\cdot \:1\left(-2\right)}}{2\cdot \:1}\\\Rightarrow x=1, -2[/tex]

When x = 1

[tex]y=-2-1\\\Rightarrow y=-3[/tex]

When x = -2

[tex]y=-2-(-2)\\\Rightarrow y=0[/tex]

So, the line and curve will intersect at points (1,-3) and (-2,0)

${teks-lihat-gambar} boffeemadrid

Other Questions