Jawapan

2015-03-20T12:23:24+08:00
3x(x+3) = 4(5x+1)
3x² + 9x = 20x + 4
3x² + 9x - 20x - 4 = 0
3x² - 11x - 4 = 0
(3x + 1)(x - 4) = 0
  • Pengguna Brainly
2015-03-21T09:06:10+08:00
3x(x+3) = 4(5x+1)
3x^2 + 9x = 20x + 4
3x^2-11x-4 = 0
(3x+1)(x-4)