- 28 - 40i
note that i² = (√-1)² = - 1
expand product of factors using FOIL
= - 6 - 6i - 14i - 14i² - 20i + 36i²
= - 6 - 6i - 14i + 14 - 20i - 36
= - 28 - 40i
Answer:
Figure it on your own
Step-by-step explanation:
Because i said so
Answer:
80/4
Step-by-step explanation:
You do
which is 80/4
-5, because subtracting a negative is the same as adding a positive, which will bring -9 up to -5
Answer:

Step-by-step explanation:
Using quadratic formula

we will have two solutions.
2x^2 - x - 4 = 0
So, a=2 b=-1 c=-4, we have:

Finally, we have two solutions:
