Question

Soal ada di file
nomer 4 ( A sampai E)
Mohin bantuannya, pakai cara penyelesaiannya!

Answer 1

Nomor 4

bagian a
x² - 16 = 0
x² - 4² = 0
(x - 4)(x + 4) = 0
x = 4 v -4

bagian b
x² + 3x = 0
x(x + 3) = 0
x = 0 v -3

bagian c
x² - x - 2 = 0
x² - 2x + x - 2 = 0
x(x - 2) + x - 2 = 0
(x + 1)(x - 2) = 0
x = -1 v 2

bagian d
x² + 4x + 3 =  0
x² + 3x + x + 3 = 0
x(x + 3) + x + 3 = 0
(x + 1)(x + 3) = 0
x = -1 v -3

bagian e
x² - 2x - 8 = 0
x² - 4x + 2x - 8 = 0
x(x - 4) + 2(x - 4) = 0
(x + 2)(x - 4) = 0
x = -2 v 4