Use completing the square to solve (x + 7)(x – 9) = 25 for x.

The answer is C..

x=1+/- the square root of 89

Given the equation:

Then;

Using the distributive property,

Combine like terms;

Subtract 25 from both sides we have;

Using completing square form:

Add and subtract we have;

⇒

Add 89 to both sides we have;

⇒

Taking square root both sides we get;

Add 1 to both sides we have;

Therefore, the values of x are:

and  

hi there!

step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

hope this : )