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sassyparker1216
25.07.2019 •
Mathematics
Examine the quadratic equation: x^2+2x+1=0
a: what is the discriminant of the quadratic equation?
b: based on the discriminant, which statement about the roots of the quadratic equation is correct?
select one answer choice for question a, and select one answer choice for question b.
a: 3
a: 0
a: −3
b: there is one real root with a multiplicity of 2 .
b: there are two real roots.
b: there are two complex roots
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Ответ:
A: 0
B: There is one real root with a multiplicity of 2.
Step-by-step explanation:
![\bf{x^2+2x+1=0}](/tpl/images/0129/5317/843f1.png)
A:The discriminant of the quadratic equation can be found by using the formula:
.
In this quadratic equation,
a = 1b = 2c = 1I found these values by looking at the coefficient of
and
. Then I took the constant for the value of c.
Substitute the corresponding values into the formula for finding the discriminant.
Simplify this expression.
The answer for part A is![\boxed{0}](/tpl/images/0129/5317/b3722.png)
B:The discriminant tells us how many real solutions a quadratic equation has. If the discriminant is
Negative, there are no real solutions (two complex roots).Zero, there is one real solution.Positive, there are two real solutions.Since the discriminant is 0, there is one real root so that means that the first option is correct.
The answer for part B is
Ответ:
A: 0
B: There is one real root with a multiplicity of 2 .
Step-by-step explanation:
Given a quadratic equation:
You can find the Discriminant with this formula:
In this case you have the following quadratic equation:
Where:
Therefore, when you substitute these values into the formula, you get that the discriminant is this:
Since
, the quadratic equation has one real root with a multiplicity of 2 .
Ответ:
Step-by-step explanation:
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1) It helps low paying jobs persons to have a shelter.
2) The cost of renting is cheaper than purchasing a house of own.
3) Renting makes the housing more affordable.
4) More people get able to rent a place to live even luxurious as it is cheaper than bought a kothi or something like that.