|-10-3i| what is the answer step by step

2 answers:

5 0

I got −10−3=−10−3=−10+−3=−13

FinnZ [79.3K]4 years ago

4 0

Well, we can't add them, but i is √-1 so we can do this
|-1(10+3i)|
we to know that 10+3i is positive so we get rid of that negative 1

10+3i would be the answer
it isn't equal to antyhing so that's just the simplest form

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Y=x^2+2x+1 find the vertex

Bess [88]

I'm going to put this into vertex form, which is y=a(x-h)^2+k

To do this, you use completing the square. Start by subtracting 1 from each side

-1+y=x^2+2x

Then, divide b (2) by 2 and square it. Add that number to each side. (normally when you complete the square, you take out the gcf of the right side of the equation before you do this. Then, you would multiply (b/2)^2 by the gcf before adding it to the left side. Since there is no gcf, we do not have to worry about this)

2/2=1
1^2=1
-1+1+y=x^2+2x+1

Next, simplify the left side and factor the right side.

y=(x+1)^2

This is vertex form. a=1, h=-1, and k=0

The vertex is (h,k) so it is (-1,0)

hope this helps!

7 0

4 years ago

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