tolong bantuin donk my friend

x1 + x2 = -b/a = -(p-3)/1 = -(p - 3)
x1.x2 = c/a = 4/1 = 4

x1² + x2² = p - 5
(x1 + x2)² - 2x1.x2 = p - 5
(-(p-3))² - 2(4) = p - 5
p² - 6p + 9 - 8 = p - 5
p² - 6p + 1 = p - 5
p² - 6p - p + 1 + 5 = 0
p² - 7p + 6 = 0
(p - 6)(p - 1) = 0
p = 6 atau p = 1