Complete the square to re-write the quadratic function in vertex form:
y = x2 + 4x – 9

− 2 ± √ 13

Step-by-step explanation:

(-b±√(b²-4ac))/(2a)

Plug in and solve.

y = (x + 2)² - 13

Step-by-step explanation:

y = x² + 4x - 9

To complete the square

add/ subtract ( half the coefficient of the x- term)² to x² + 4x

y = x² + 2(2)x + 4 - 4 - 9

  = (x + 2)² - 13 ← in vertex form

1/5^2 = 7.56/45

50*10 is greater

step-by-step explanation:

if you add the zero from 10 to 50, it will give you a bigger number.