Question

Penyelesaian persamaan kuadrat :
a. 2x²-18=0
b. 4x²-9=0
c. 2x²+8x=0

Answer 1

A) 2(x² - 9) = 0
  2(x + 3)(x - 3) = 0
x = - 3 atau x = 3

b) 4x² - 9 = 0
(2x + 3)(2x - 3) = 0
x = - 3/2 atau x = 3/2

c) 2x² + 8x = 0
2x(x + 4) = 0
x = 0 atau x = - 4