Answer:
14-5i
Step-by-step explanation:
Distribute using FOIL
12+3i-8i-2i^2
i^2 = -1
12+3i-8i-2(-1)
12+3i-8i+2
Combine like terms
14-5i
Mmm, x is equals to -7....
Answer:
Step-by-step explanation:
The radius r can be found from the relationship
The point is in Quadrant II (-, +), so use the inverse cosine function to find the angle.
See the attached image.
Slope intercept means
y=mx+c
the slope of the line is m=(y2-y1)/(x2-x1)=(-3-5)/(1+1)= -4
the equation of the line is
y-5 = -4(x+1)
4x+y-1=0
changing the equation into slope intercept form
y= -4x+1