Jawapan

2016-03-13T20:23:47+08:00
X + 2y = 4 x² - 3y + y² = 4 x = 4 - 2y ( 4 - 2y )² - 3y + y² = 4 4y²-16y + 16 - 3y + y²=4 5y² - 19y + 12= 0 (5y-4) (y-3) = 0 y = 4/5 , y = 3 x = 4 - 2(4/5) = 12/5 x = 4 - 2(3) = -2