D= -39
The solution is 2 complex roots
Work shown in attached image
For angle a it will be 42degrees and for angle b it will be 138degrees and i am 100%sure
PEMDAS states that the value in the parenthesis should be evaluated first:
4(5*6)
4(30)
After just multiply the value in the parenthesis by the number outside of the parenthesis:
120
I’m pretty sure the answer is (2,1)