jpjzhf9的部落格

標題:

quadratic equation

發問:

1.A graph of y=3x^2+7x+p where p＞0.Find all the possible integral value(s) of p. 2.A graph of y=-x^2+3k+k.It cuts the x-axis at two pointsA(-1,0) and B,and cuts the y-axis at point C. (a)Find the value of k. (b)Find the coordinates of B and C. (c)Find the area of traingle ABC 更新: 1.delta has 2 distinct real roots

最佳解答:

1) product of root = p / 3 Since p > 0, p / 3 > 0 The root is negative-negative or positive-positive of positive delta = 49 - 12p >= 0 12p
其他解答:

Sorry that I make a mistake.

• i-tunes 與CD--
• F.3 Maths (Mensuration)@1@
• 勁舞團一問@1@

此文章來自奇摩知識+如有不便請留言告知