What’s the question???...
Use this version of the Law of Cosines to find side b:
b^2 = a^2 + c^2 − 2ac cos(B)
We want side b.
b^2 = (41)^2 + (20)^2 - 2(41)(20)cos(36°)
After finding b, you can use the Law of Sines to find angles A and C or use other forms of the Law of Cosines to find angles A and C.
Try it....
Answer - C - SSS because you know no angle measures
X = - 1/3 or an alternate form x = -0.3, x = -3 to the power of -1
So what you do is subtract 4b on both sides so it will be -ax=9+4b then divide x on both sides and you have your answer
