SOLUTION: a) If x^2 + y^2 + 4x -2y +1=, show that (x+2)^2 + (y-1)^2 =4 b) x^2 + y^2 - 6x - 8y =0 can be written in the form (x - a)^2 + (y+b)^2= c, find the values of a,b and c

Question 1115398: a) If x^2 + y^2 + 4x -2y +1=, show that (x+2)^2 + (y-1)^2 =4
b) x^2 + y^2 - 6x - 8y =0 can be written in the form (x - a)^2 + (y+b)^2= c, find the values of a,b and c
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
a)

....complete squares

use the rule:
since you have first term and middle term , means that coefficient and =>=>
and
since you have first term and middle term , means that coefficient and =>=>
then, you have

b)
written in the form ( is wrong, should be )

so, , and

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