Mohon bantuannya yaa

y = x^2 - 2x - 3 dicerminkan terhadap x = 4
(x, y) dicerminkan terhadap x = a => (2a - x, y)
(x, y) dicerminkan terhadap x = 4 => (2.4 - x, y) = (8 - x, y)
1) 8 - x = x' => x = 8 - x'
2) y = y'
Bayangan y = x^2 - 2x - 3 adalah
=> y' = (8 - x')^2 - 2(8 - x') - 3
=> y' = 64 - 16x' + x'^2 - 16 + 2x' - 3
=> y' = x'^2 - 14x' + 45
=> y = x^2 - 14x + 45
=> y = x^2 - (9 + a)x + 9a
9a = 45
a = 5
a^2 = 25

^ = pangkat