Jawaban Soal Sistem Persamaan Linier Kuadrat Kelas SMA/SMK Belajar dari Rumah TVRI Hari Ini

D = (-(3+a))2-4.1.9 = 0

9 + 6a +a2 -36 =0

a2+6a-27=0

a=-9 atau a=3

9.(-3) -> 9.(-3) = 27

9 + (-3) = 6

2. y=y

x2 - 3x + p = px-3

x2 - 3x - px +p = -3

x2 - (3+p)x + p +3 = 0

a = 1, b = -(3+p), c = p+3

D = b2-4.a.c

b2 - 4.a.cc < 0

(-(3+p))2 - 4.1.(p+3) < 0

9 + 6p + p2 -(4p+12) < 0

9 + 6p+p2 - 4p - 12 < 0

p2 + 2p - 3 <0

(p+3)(p-1) < 0

p = -3 p = 1

Sehingg, -3 < p < 1