Need help finding this answer for my last homework

the answer will be

its kind of blurry. can you put a clearer pic?

step-by-step explanation:

if you was gonna solve for a, a is a   < -12

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus