Answer:
E. -5i/4
Step-by-step explanation:
![\frac{9 + 3i - 3i -i^{2}}{-4 -8i -4i^{2} } =\frac{9-(-1)}{-4-8i-4(-1)} =\frac{10}{-8i} =\frac{-5}{4i} =\frac{-5i}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B9%20%2B%203i%20-%203i%20-i%5E%7B2%7D%7D%7B-4%20-8i%20-4i%5E%7B2%7D%20%7D%20%3D%5Cfrac%7B9-%28-1%29%7D%7B-4-8i-4%28-1%29%7D%20%3D%5Cfrac%7B10%7D%7B-8i%7D%20%3D%5Cfrac%7B-5%7D%7B4i%7D%20%3D%5Cfrac%7B-5i%7D%7B4%7D)
Answer:
1.B 2.B 3.B 4.B
Step-by-step explanation:
They are all B 0_0
Answeri dont know either and that is the same question i need help with
Step-by-step explanation:
Answer:
do you have any other info
Step-by-step explanation:
Answer:
(- 2, 9 )
Step-by-step explanation:
Given a parabola in standard form, y = ax² + bx + c : a ≠ 0
Then the x- coordinate of the vertex is
= - ![\frac{b}{2a}](https://tex.z-dn.net/?f=%5Cfrac%7Bb%7D%7B2a%7D)
y = - x² - 4x + 5 ← is in standard form
with a = - 1 and b = - 4, thus
= -
= - 2
Substitute x = - 2 into equation for corresponding y- coordinate
y = - (- 2)² - 4(- 2) + 5 = - 4 + 8 + 5 = 9
vertex = (- 2, 9 )