Number One)
Solutions please:
f(x)= (x−1)^2−36
_
Number Two)
Harry solved a quadratic equation. His work is shown below.
In which step did Harry make an error?

Original: (x−5) ^2+6=42

Step One:(x−5)^2=36

Step Two: x-5=6

Step Three: x=11

Number Three:
(image)

Step-by-step explanation:

(1)

First, let's expand the expression:

Next, let's factor the quadratic:

Finally, set the equation equal to to find the solutions

(2) During the step , when you take the square root of both sides, you have two equations, rather than one:

and , so the solutions should be

(3)

Add to both sides

Multiply both sides by

Take the square root of both sides

±

Subtract from both sides

answer:

c. the third graph