bantu kak plis :)
2. Tentukan akar-akarnya
a. x² + 2x + 1 = 0
x² + x + x + 1 = 0
x(x + 1) + 1(x + 1) = 0
(x + 1)(x + 1) = 0
x + 1 = 0
x = -1
b. p² - 6p - 8 = 0
p² - 2p - 4p - 8 = 0
p(p - 2) - 4(p - 2) = 0
(p - 4)(p - 2) = 0
p - 4 = 0 atau p - 2 = 0
p = 4 atau p = 2
c. a² - 4a = 12
a² - 4a - 12 = 0
a² + 2a - 6a - 12 = 0
a(a + 2) - 6(a + 2) = 0
(a - 6)(a + 2) = 0
a - 6 = 0 atau a + 2 = 0
a = 6 atau a = -2
d. c² + 6x + 9 = 0
e. 3x² + 6x = 4
3x² + 6x - 4 = 0
f. 3x² - 8x + 5 = 0
3x² - 3x - 5x + 5 = 0
3x(x - 1) - 5(x - 1) = 0
(3x - 5)(x - 1) = 0
3x - 5 = 0 atau x - 1 = 0
x = 5/3 atau x = 1
g. 2p² - 9p - 5 = 0
2p² - 10p + p - 5 = 0
2p(p - 5) + 1(p - 5) = 0
(2p + 1)(p - 5) = 0
2p + 1 = 0 atau p - 5 = 0
2p = -1 atau p = 5
p = -1/2 atau p = 5
[answer.2.content]
