Exploring Quadratics and Heron's Formula

Solve x² + 4x + 3 = 0 :

解 x² + 4x + 3 = 0 :

• x = 1 and x = 3

  x = 1 及 x = 3

• x = 6 and x = -2

  x = 6 及 x = -2

• x = -1 and x = -3

  x = -1 及 x = -3

• x = 1 and x = 3

  x = 1 及 x = 3

Tags

CCSS.HSA.REI.B.4

Solve x² + 4x - 40 = -8 :

解  x² + 4x - 40 = -8 :

• -10 and -4

  -10 及 -4

• -4 and 10

  -4 及 10

• -8 and 4

  -8 及 4

• 8 and -4

  8 及 -4

Tags

CCSS.HSA.REI.B.4

solve 2x² + 2x - 12 = 0 :

解 2x² + 2x - 12 = 0 :

• -2, 3

• 2, 3
• 2, -3
• -2, -3

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.CED.A.1

Solve    2x² + 7x - 15 = 0

解    2x² + 7x - 15 = 0

• -1.5 or 5

  -1.5 或 5

• No Solution

  沒有解

• -5 or 1.5

  -5 或 1.5

• 0.7 or 5

  0.7 或 5

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.3

Solve the equation 3x² - 14x + 15 = 0.

解方程 3x² - 14x + 15 = 0。

The x-intercepts of the graph of y = 20x² + 7x – 6 are

y = 20x² + 7x – 6 的圖像的x截距是

The x-intercepts of the graph of y = x² – 9x – 36 are

y = x² – 9x – 36 的圖像的x截距是

• –3 and 12.

  –3 和 12。

• 3 and –12.

  3 和 -12。

• –4 and 9.

  –4 和 9。

• 4 and –9.

  4 和 -9。

y = 3x² – 8x + 4 的圖像的x截距是

The x-intercepts of the graph of y = 3x² – 8x + 4 are

• –2 and 3.

  –2 和 3。

• 2 and –3.

  2 和 –3.

Find the area of the given Triangle

求圖中三角形面積

• 4 sq.m

• 5 sq.m

• 6 sq.m

• 7 sq.m

Use Heron's Formula to find the Area.

以希羅公式求圖中面積

• 82.5 ft²

• 47.9 ft²

• 47.3 ft²

• 65.3 ft²