Write the standard form of the equation and the general form of the equation of the circlewith radius r and center (h.k). Then graph the circle.r= 10; (h,k) = (8,6)The standard form of the equation of this circle isThe general form of the equation of this circle is(Simplify your answer.)Graph the circle.-20 -18Click toenlargegraph

Respuesta :

To solve this problem, we will first find the standard form of the circle equation. Given a circle of radius r and center (h,k), the standard form of the circle equation would be

[tex](x-h)^2+(y-k)^2=r^2[/tex]

In our case, we have h=8 , k=6 and r=10. So the equation for the given circle would be

[tex](x-8)^2+(y-6)^2=10^2=100[/tex]

The general form of the circle equation can be obtained from expanding the squares on the left side of the equality sign. Recall that

[tex](a-b)^2=a^2-2a\cdot b+b^2[/tex]

So, applying this to the standard equation we get

[tex](x-8)^2=x^2-16x+64[/tex][tex](y-6)^2=y^2-12y+36[/tex]

So our equation becomes

[tex]x^2-16x+64+y^2-12y+36=100[/tex]

Operating on the left side, we have

[tex]x^2-16x+y^2-12y+100=100[/tex]

By subtracting 100 on both sides, we get

[tex]x^2-16x+y^2-12y=0[/tex]

which the general form of the equation of the given circle.

Using a graphing tool, we have that the circle's graph would be

Ver imagen MaddockU499064