Question

Help please!

Change the function f(x) = 2x² + 8x +5 into vertex form.
f(x) == 2(x+4)² +5
f(x) == 2(x+2)² +5
f(x) == 2(x+2)² −3
f(x) == 2(x+4)² - 27

Answer 1

C) f(x) = 2(x+2)² - 3

Step-by-step explanation:

Given function:

f(x) = 2x² + 8x +5

• Vertex form: y = a(x - h)² + k

For this function:

⇒ y = 2x² + 8x + 5

⇒ y = 2(x² + 4x) + 5

⇒ y = 2(x + 2)² + 5 - 2(2)²

⇒ y = 2(x + 2)² - 3