The answer is C because you just turn it upside down
If the triangle is a right triangle, the pythagorean theorem would work
since it doesn’t, the triangle is NOT A RIGHT TRIANGLE
(see attached pic for work :))
4 - 9x = -14
4 - 4 - 9x = -14 - 4
9/9x = -18/9
x = -2
6×6=36. also get a calculator