Changing Quadratic Forms

Which of the following shows
f(x) = x² - 8x + 1
written in vertex form?

• f(x) = (x - 4)² - 15
• f(x) = (x - 4)² + 17
• f(x) = (x - 4)² - 17
• f(x) = (x - 4)² + 65

• y = (x+8)(x+6)

• y = (x+8)(x-6)

• y = (x-6)(x-8)

• y = (x-8)(x+6)

Which of the following is Standard Form?

Which of the following is Vertex Form?

Which of the following is Intercept Form?

• y = (3x - 21)(x + 2)

• y = 3(x - 7)(x + 2)

• y = (3x - 15)(x - 42)

• y = 3(x + 7)(x - 2)

Convert to Intercept form:

f(x) = x²+3x-18

• (x-6)(x+3)

• (x+6)(x+3)

• (x+6)(x-3)

• (x-6)(x-3)