Question

Answers and work for answers please

Answer 1

1) 5 2) 6 3) 1.25 or -1.75

Explanation:

1. x^2 - 25 = 0

x^2 - 25 = 0

First, add 25 to both sides!

x^2 = 25

Now square root both sides.

x = 5

2. (x-2)^2 = 16

First, square root both sides.

(x-2) = 4

Add 2 on both sides.

(x) = 6

x = 6

3. Quadratic Formula = -b ±
`\sqrt{b^(2)-4ac }` / 2a

Substitute in:

-6 ±
`\sqrt{7^(2) -4(2)(6)}` / 2(2)

-6±
`√(49 - 48)` / 4

Both forms:

-6 +
`√(1)` / 4

5 / 4 = 1.25

Negative:

-6 - 1 / 4

-7 / 4 = -1.75