Jawabanmu

2014-09-07T19:03:12+07:00
2014-09-07T19:04:35+07:00
A), 20y - 100
b), 5x² - x + 25x - 5 = 5x² + 24x - 5
c). 14x - 49 - 4x² - 14x = 4x² - 49