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Viefleur [7K]
2 years ago
12

Simplify by combining like terms: -5x - 13 + 7y + 26x *

Mathematics
1 answer:
sergeinik [125]2 years ago
8 0
Your answer will be 21x+7y-13
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Complex root of x^2+3x+9=0
Luden [163]

\text{Quadratic formula}

ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}

-----------------------------------------------------------------------

x^2+3x+9=0\\\\a=1;\ b=3;\ c=9\\\\\Delta=3^2-4(1)(9)=9-36=-27\\\\\sqrt\Delta=\sqrt{-27}=\sqrt{(27)(-1)}=\sqrt{27}\cdot\sqrt{-1}=\sqrt{9\cdot3}i=\sqrt9\cdot\sqrt3i=3\sqrt3i

x_1=\dfrac{-3-3\sqrt3i}{2(1)}=-\dfrac{3}{2}-\dfrac{3\sqrt3}{2}i\\\\x_2=\dfrac{-3+3\sqrt3i}{2(1)}=-\dfrac{3}{2}+\dfrac{3\sqrt3}{2}i


i=\sqrt{-1}

6 0
3 years ago
Please help thanks.
lilavasa [31]

Answer:

Option A

I hope this helps!

4 0
2 years ago
Two random samples were taken to determine how often people in a community listen to the local radio station each month.
tangare [24]
I do not get what the Question that you are asking is.

4 0
2 years ago
What is the qoutient of -18÷ (-1 over 6) ?
topjm [15]
...
When you divide a negative integer by a negative, it becomes a positive.  Also, when you have a problem like this...-18/-1/6, you switch the -1 and 6, leaving us -18/-6, but also, in the process of flipping the two numbers, we change to -18*-6.  Henceforth...-18/(-1/6)=-18*-6=108.
6 0
3 years ago
Read 2 more answers
Can someone help me with this. Will Mark brainliest. Need answer and explaination/work. Thank you!
Lesechka [4]
The mid point would be (1,25.5)
3 0
2 years ago
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