數學幫
幫幫=-=solve the follwing quadratic equations using the
quadratic formula.(leave your answers in sued form if necessary)
1:7x-6+5x(2次)=0
solve the follwing quadratic equations using the
quadratic formula.(give your answers correct to 2 decimal places)
2:-17x(2次)-23x+5=0
solve the follwing quadratic equations using the
quadratic formula.(leave your answers in surd form)
5 1
3:x(2次)--x- -=0
4 2
幫幫手 要祥解
-=分數線
-=減
個2次唔識打 所以打2次
5知有冇錯XD 洗唔洗詳盡步驟? 2次 = ^2 5x^2+7x-6=0
(5x-3)(x+2)=0
x=3/5 or -2
-17x^2-23x+5=0
17x^2+23x-5=0
(17x-5)(x+1)=0
x=5/17 or -1
x^2-5x/4-1/2=0
4x^2-5x-2=0
Quadratic Equ.自己計
中四? 查實大部份都係可以用番中3因式分解做....
唔算太難 回復 4# 刺客先生
係-.- 要用quadratic formula 回復 2# 〝細wIN_
要 你識唔識做 要用quadratic formula=/= 其實禁機都做到 只不過要寫返D過程 唔難 回復 6# 天︱下
咁你識唔識用個條式Sub數黎做?
打出黎好煩= =
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