tolong ya. mau kumpul skrang ni

4. P(2a+1, -a+2) dan a=3
Maka P(2(3)+1, -3+2) = P(7, -1)
r = 2√3
(x-a)^2 + (y-b)^2 = r^2
(x-7)^2 + (y+1)^2 = (2√3)^2
x^2 - 14x + 49 + y^2 + 2y + 1 = 12
x^2 + y^2 - 14x + 2y + 38 = 0
Jawaban B

5. x^2 + y^2 - 4x + 10y + 17 = 0
x^2 - 4x + y^2 + 10y + 17 = 0
x^2 - 4x + 4 + y^2 + 10y + 25 - 12 = 0
(x-2)^2 + (y+5)^2 - 12 = 0
(x-2)^2 + (y+5)^2 = 12
Jawaban A