If you expand out the brackets you get this,
(4+5i)(a+2i) = 4a + (5a)i + 8i - 10
The -10 comes from 5i * 2i.
Squaring i becomes -1.
Let's group the real stuff together,
and imaginary separately,
(4a - 10) + (5a + 8)i
For this to be purely imaginary,
the real part needs to be zero.
Therefore 4a - 10 = 0
Solve for a.
Answer:
i believe it is -4 1/3 i may be wrong
Step-by-step explanation:
difficult, let me see....
1st slope:-4
2nd slope:4/6
3rd slope:-3
-2+4/7-3=-5+4/6=-4 2/6=
-4 1/3
Answer:
1. (-0,286; 0), (1,333; 0)
2. (0; -8)
Answer: 3/8, I had got it correct on Edge 2020 :)
Answer:
y= (1/2)x+(3/4)
Step-by-step explanation:
