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MissTica
3 years ago
5

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.The roots of an equa

tion are x = -1 ± i. The equation is x2 + ? + 2 = 0.
Mathematics
1 answer:
Sliva [168]3 years ago
5 0


When we know the roots are r and s we can just multiply (x-r)(x-s) and set it to zero to recover the original quadratic equation.  We can then scale to get rid of fractions or common factors if we like.


0 = (x - (-1 + i))(x - (-1 -i)) = x^2 - ( (-1+i)+(-1-i) ) x + (-1 + i)(-1 -i)


0 = x^2 + 2x + 2


The linear term coefficient is negative the sum of the roots, which in the case of conjugates is (negative) twice the real part, coefficient +2 here. The constant term is the product of the roots, which in the case of conjugates is the squared magnitude, here 1^2+1^2.


We got a 2x in the middle so we get


Answer: 2x



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Answer:

For 1) you must do that yourself from least to greatest.

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3) least snow was 1 and 2/4

4) it snowed 3 and 1/4 3 days long.

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Step-by-step explanation:

Hope this helped.

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2 years ago
3. Francis has an unpaid balance of $480 on his credit card.
GarryVolchara [31]

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4 dollars 80 cents

Step-by-step explanation:

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3 years ago
The number 85 is decreased to 83. What is the percentage by which the
Readme [11.4K]

Answer:

~ 2.3%

Step-by-step explanation:

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5 0
3 years ago
the sum of two numbers is 35 think of 2 numbers that make up 35 and then subtract them and see if they make 15 {no the answer is
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3 years ago
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0.7 hours

Step-by-step explanation:

Given that Irina was able to make the same distance from work to home in 0.4 of an hour at 27 miles per hour, we can use this rate and time to find the distance she travels to and from work using the general formula:

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3 0
3 years ago
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