Question

One solution to the problem below is 5. What is the other solution? c^2 - 25 = 0

Answer 1

c=-5

Explanation:

c^2-25=0

I'm going to solve this by using square root after I get the square termed by itself.

`c^2-25=0`

Add 25 on both sides:

`c^2=25`

Square root both sides:

`c=\pm √(25)`

`c=\pm 5`

Check!

`(5)^2-25=0 \text{ and } (-5)^2-25=0`

Answer 2

c = -5

Explanation:

Plug in -5 to c in the equation:

c² - 25 = 0

(-5)² - 25 = 0

Simplify. First, solve the power, then solve the subtraction:

(-5)² - 25 = 0

(-5 * -5) - 25 = 0

(25) - 25 = 0

0 = 0 (True)

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