3.selesaikan persamaan kuadrat berikut dengan melengkapkan kuadrat! 1. X²+12x+36=0 2. X²-8x-84=0 3. X²-16x+48=0 4. X²+7x-30=0

1. X²+12x+36=0
(X + 6) (X + 6 ) = 0

x + 6 = 0
x = -6

Hp = {-6}

2. X²-8x-84=0
(x - 14) (x + 6) = 0

• x - 14 = 0
x = 14

• x + 6 = 0
x = -6

Hp = {-6, 14}

3. X²-16x+48=0
(x - 12) (x - 4) = 0

• x - 12 = 0
x = 12

• x - 4 = 0
x = 4

Hp = {4, 12}

4. X²+7x-30=0
(x + 10) (x - 7) = 0

• x + 10 = 0
x = -10

• x - 7 = 0
x = 7

Hp = {-10, 7}