The equation tan−1 = {8.9/7.7} x can be used to find the measure of angle lkj. what is the measure of angle lkj?
round to the nearest whole degree.

Base on my research and further computation, the possible answer of the angle X by using the tan-1, LKJ is equals to = 30 degree. I hope you are satisfied with my answer and feel free to ask for more if you have questions and further clarifications. 

X^4 + 36x^2 = x^2(x^2+36)= x*x*(x+6i)(x-6i) mark me brainliest