Tolong dong nomor 18 & 19!!

18][
y = y
x² + (p + 1)x + 7 = -x² - px + 4
2x² + (2p + 1)x + 3 = 0
x1 + x2 = -b/a
-(2p + 1)/2 = -7/2
2p + 1 = 7
p = 3 ✓

19][
y = y
x² + 4x + 6 = -x² - 4x - p
2x² + 8x + 6 + p = 0

1 solusi ---> D = 0
D = 0
b² - 4ac = 0
8² - 4.2(6 + p) = 0
6 + p = 8
p = 2

2x² + 8x + 6 + p = 0
2x² + 8x + 8 = 0
x² + 4x + 4 = 0
(x + 2)² = 0
x = -2

y = x² + 4x + 6
y = (-2)² + 4(-2) + 6
y = 2

(x , y) = (-2 , 2) ✓