求抛物线y=3x2-8x+4与x轴的交点坐标,并作草图验证
问题描述:
求抛物线y=3x2-8x+4与x轴的交点坐标,并作草图验证
答
y=3x²-8x+4 = (3x-2)(x-2) = 0
x = 2/3或x = 2
(2/3, 0)及(2, 0)
求抛物线y=3x2-8x+4与x轴的交点坐标,并作草图验证
y=3x²-8x+4 = (3x-2)(x-2) = 0
x = 2/3或x = 2
(2/3, 0)及(2, 0)