✔ 最佳答案
蛇仔~ = 2次方
你可以 寫 3y^2 = 2y +8
答案:
Move the 2y and 8 to the other by subtracting them on both sides and made the other side equal to zero
3y^2 - 2y - 8 = 0
then use factoring
(3y + 4) (y - 2) = 0
set it both mutiple equal to zero
3y + 4 = 0
so y equal to -4/3
y - 2 = 0
so y equal to 2
both answers works, so you can answer like this
y = -4/3
y=2
or
y= -4/3 ; 2
2010-09-03 05:18:28 補充:
for 小魚:
y 是可以有兩個答案的
如何演變: i told u in MY answer, you factor (分解) 3y^2 - 2y - 8 = 0
2010-09-05 02:24:13 補充:
唔好意思!! 我中文唔系太好!!
此外我學的所有數學術語是英文,不能幫你。
Sorry!! >.