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Novay_Z [31]
3 years ago
10

What are the values of x and y​

Mathematics
1 answer:
andrey2020 [161]3 years ago
3 0
X is 35 degrees and Y is 70 degrees
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In the third degree polynomial function f(x) =x^3 + 4x, why are 2i and -2i zeros?
IgorC [24]

Answer:

We just need to evaluate and get f(2i)=0, f(-2i)=0.

Step-by-step explanation:

Since i^2=-1, then i^3=i^2i=-i, and we can apply this when we evaluate f(x) =x^3 + 4x for 2i and -2i.

First we have:

f(2i) =(2i)^3 + 4(2i)=2^3i^3+8i=8(-i)+8i=0

Which shows that 2i is a zero of f(x).

Then we have:

f(-2i) =(-2i)^3 + 4(-2i)=(-2)^3i^3-8i=-8(-i)-8i=8i-8i=0

Which shows that -2i is a zero of f(x).

4 0
3 years ago
How to solve for x 2+9x^2=6
juin [17]

Answer:

The answer is : 2/3

Step-by-step explanation:

2+9x^2=6

9x^2 = 6 - 2

9x^2 = 4

x^2 = 4/9

x = √(4/9)

x = 2/3

4 0
3 years ago
I NEED HELP ASAP BEFORE IT TIMES OUT!
padilas [110]
Ahh ok so split it up into two rectangles:

Rectangle one:
A=lw
A=4(12)
A=48

Rectangle two:
A=lw
A=10(2)
A=20

Add both areas up to get 68 ft squared!! :)
7 0
3 years ago
Read 2 more answers
Please help me idk this
KiRa [710]

Answer:

x=128

Step-by-step explanation:

x and 52 are supplementary, so they add up to 180°

x+52=180\\x=128

6 0
3 years ago
Read 2 more answers
I NEED HELP PLEASE, THANKS! :)
Aleonysh [2.5K]

but where is ur question ??????

5 0
3 years ago
Read 2 more answers
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