Complete the square to re-write the quadratic function in vertex form:
y = x2 – 7x - 6

y = (x - 3.5)^2 - 18.25

Step-by-step explanation:

y = x^2 – 7x - 6

y = (x^2 – 7x) - 6

y = (x^2 – 7x + 3.5^2 - 3.5^2) - 6

y = (x^2 – (2)(3.5)x + 3.5^2) - 3.5^2 - 6

y = (x - 3.5)^2 - 3.5^2 - 6

y = (x - 3.5)^2 - 18.25

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632