When - 360 degree ≤ x ≤ 0 degree, solve the equation 2Sin (2x + 60 degree) - 1 = 0 to help do the next process 3Q

When - 360 degree ≤ x ≤ 0 degree, solve the equation 2Sin (2x + 60 degree) - 1 = 0 to help do the next process 3Q

1. From 2Sin (2x + 60 °) - 1 = 0, sin (2x + 60 °) = 1 / 2
2. When - 360 °≤ x ≤ 0, there are two values, namely - 210 ° and - 330 ° sine value is 1 / 2
3.(1)2x+60=-210 x=-135°
(2) 2X + 60 = - 330, x = - 195 °. You can draw a sine wave

How to solve 2x + 4 (4x) = 360

2X+4(4X)=360
2x+16x=360
（2+16）x=360
18x=360
x=20

What is the solution of 60 + (20 + x) + 2x = 360?

280/3

(360-2x)(265-2x)=720
x=____

(360-2x)(265-2x)=720
95400-720x-530x+4x²=720
2x²-625x+47340=0
x=(625±√11905)/2
If approximate
x≈367,x≈258