tolong kak dibantu pakai cara :)

x1 = y²

y = x2 - 2
x2 = y + 2

x1 = x2
y² = y + 2
y² - y  - 2 =0
D = b²-4ac
D = (-1)²-4(1)(-2) = 9
Luas = D√D/(6a²)
Luas = 9√9/(6) = 27/6 = 4,5

titik potong thd sb y

x = y² 
x = y+2
x₁ = x₂
 y² = y+2
 y²-y-2 = 0
(y-2)(y+1) = 0
 y = 2 and y = -1

batas bawah = -1
batas atas  = 2

L = ∫ x₂ - x₁ dy
   = ∫ y+2- y² dy
   = ∫ -y² + y +2 dy
   = -¹/₃ y ³+¹/₂y² + 2y

L   = (-¹/₃.2³+¹/₂.2² + 2.2) - (-¹/₃.(-1)³+¹/₂.(-1)² + 2.(-1))
     = (-⁸/₃+2+4) - (¹/₃+¹/₂-2)
     = (¹⁰/₃) - (-⁷/₆)
     = ²⁷/₆
     = ⁹/₂
     = 4 ¹/₂ satuan