Express in vertex form

Y=2x^2 - 2x - 5

y = 2(x - )² -

Step-by-step explanation:

y = 2x² - 2x - 5 ← factor out 2 from the first 2 terms

 = 2(x² - x) - 5

Using the method of completing the square

add/subtract (half the coefficient of the x- term)² to x² - x

y = 2(x² + 2(- ) x + - ) - 5

  = 2(x - )² + 2(- ) - 5

  = 2(x - )² - - 5

  = 2(x - )² - ← in vertex form

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation: