Question

What is the value of a for the attached circle in general form?

Answer 1

**no answer choices!!

and idk how to solve :(

Answer 2

factor the equation using prefect squares

Answer 3

which equation??

Answer 4

like the one of the circle?? (which i find??) or the general form?

Answer 5

\[x^2+ax+y^2+by+c=0\]
\[\left(x+\frac a2\right)^2-a^2+y^2+by+c=0\]

Answer 6

why whoops?? haha :P am i not seeing something ur seeing??

Answer 7

(i forgot to square ) (fixed now)

Answer 8

ohhh okay i see :P so what do i do now?

Answer 9

factor the y terms using the same technique , then move the three constants outside the brackets to the right hand side

Answer 10

(x+a/x)^2=(-a+y+by)^2

?? did i do that right?? :/ idk...

Answer 11

oops i forgot the +c...

so like this??


(x+a/x)^2=(-a+y+by)^2+c
??? idk :(

Answer 12

\[\left(x+\frac a2\right)^2-a^2+y^2+by+c=0\]
\[\left(x+\frac a2\right)^2-a^2+\left(y+\frac b2\right)^2-b^2+c=0\]
\[\left(x+\frac a2\right)^2+\left(y+\frac b2\right)^2=a^2+b^2-c\]

Answer 13

oh okay :P

but how do i solve for a?

Answer 14

compair to the general form of a circle