Question

Bantu ya...tolong...banget...

Answer 1

Dik:

(x+1)² + (y-3)² = 9memotong garis y = 3
(x+1)² + (3-3)² = 9
(x+1)²+(0-0)² = 9
(x+1)² = 9
x+2x+1 = 9
x+2x-8 = 0

Faktorkan :
(x+4)(x-2)
x = -4 atau x = 2

Titik potong : (x,y)
(=) (-4,3) atau (2,3)

garis singgung pada (-4,3)
(x-a)(x1-a) + (y-b)(y1-b) = r²
(x+1)(-4+1) + (y-3)(3-3) = 9
(x+1)(-3) + (y-3)(0) = 9
-3x-3 = 9
-x-1 = 3
x+1 = -3
x = -4


garis singgung pada (2,3)
(x-a)(x1-a) + (y-b)(y1-b) = r²
(x+1)(2+1) + (y-3)(3-3) = 9
(x+1)(3) + (y-3)(0) = 9
3x+3 = 9
x+1 = 3
x = 2

Jadi hasilnya x = 2 dan x = -4