Bantu jawab dan jelaskan soal nomor 6 ya...

Bab Persamaan Kuadrat
Matematika SMP Kelas VIII

4x² - 2x - 1 = 0
a = 4; b = -2; c = -1

x1 + x2 = -b/a = -(-2)/4 = 2/4

x1 . x2 = c/a = -1/4


x1 + x2 = p
x1 . x2 = q

p + q = x1 + x2 + x1 x2
p + q = 2/4 + (-1/4) = 1/4

p . q = (x1 + x2) . (x1 . x2)
p . q = 2/4 . (-1/4) = -1/8

x² - (p + q) x + (p . q) = 0
x² - 1/4 x + (-1/8) = 0
◎◎◎◎semuanya dikali 8◎◎◎◎
8x² - 2x - 1 = 0

jawabannya C