Answer:
Z=+6
Step-by-step explanation:
Z^5=-7776i
Let's note that i I mathematics means negative one i.e
i = -1
So the equation is equal to
Z^5=-*-(7776)
Z^5 = 7776
Z= 5√7776
Since it's a divisible by 6
It's giving us a clue that 6 it's the answer.
Ok let's check the 5th root of 7776 in our calculator.
Z=+6
+6 is the solution to the equation
Z^5=-7776i
Value of c is 16 for which equation 
is a square of binomial !
<u>Step-by-step explanation:</u>
Here we meed to find the value of c for which equation f(x) = x^2-8x+c or , is a square of a binomial . Let's find out:
We know that
⇒ 
..........(1)
Let's simplify given equation in question
⇒
⇒ 
Comparing this equation with (1) we get :
⇒ 
⇒ 
⇒ 
Therefore , Value of c is 16 for which equation is a square of binomial !
X= -b over 2a = --6 over 2×1=3
y=3²-6(3)-7=-16
vertex is (3,-16)
axis of symmetry is 3
You haven't shared the list of expressions from which you are to choose an answer.
However: you can perform this estimation yourself as follows:
Round off both -21.87 and 4.79. -21.87 goes to -22 and 4.79 to 5. Then
a good estimate of -21.87 divided by 4.79 would be -22/5, or -4.4.
Hello,
(2x^6-9x^5+4x^2-5)|x^3-5
-(2x^6-10x^3 ) | 2x^3 -9x^2 +10
-------------------
-9x^5 +10x^3 +4x^2-5
-(-9x^5+45x^2)
---------------------------
10x^3-41x^2-5
-(10x^3-50)
-----------------
-41x²+45
Answer D
