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3 years ago

How will you describe the roots of the quadratic equation x² + 3 = 5 when solved using quadratic formula?

Mathematics

2 answers:

miskamm [114]3 years ago

6 0

Answer:

I will answer you

Step-by-step explanation:

D is correct

Vaselesa [24]3 years ago

6 0

The answer is B. Sqrt= Radical symbol
1. Subtract 5 from both sides. x^2+3-5=5-5
2. New equation. x^2-2=0
3. To make it easier I am going to add 2 to the other side and take the square root of 2. x^2-2+2=0+2, x^2=2, sqrt(x^2)= sqrt(2).
4. You will get plus or minus radical 2 because when you take the square root you will always have a positive root and a negative root of any quadratic equation. x= plus and minus sqrt(2).
5. So the answer is that it’s irrational because plus and minus radical 2 is not an integer, and secondly it isn’t a perfect root which means that plus and minus radical 2 is an irrational set roots for this quadratic equation.

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DanielleElmas [232]

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3 years ago

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IrinaK [193]

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Hope this helps!

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3 years ago

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timurjin [86]

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3 years ago

Please help... need help ASAP due today... which ones are the answers?

andrey2020 [161]

Answer:

Choices 1 and 4 are correct.

Step-by-step explanation:

We first need to find what the slope of the line is. That way, we can find out which possible answers are perpendicular to it:

$\frac{4-(-2)}{3-1}=\frac{6}{2}=3$

Since we now have the slope, we need the negative reciprocal of it. Remember: if x is the slope, it's negative reciprocal will be $-\frac{1}{x}$ . Therefore, if the line's slope is 3, then we need to find answers with a slope of $-\frac{1}{3}$ .

The first answer is correct, as you have marked. The second answer, while written a little weirdly, does show the slope as 3, which we know as wrong. The third choice is not correct, however. This equation is written in point-slope form, where $y-y_{1}=m(x-x_{1})$ . The only variable we have to worry about is m, which, in the third choice, is 3. The fourth answer is correct, which sounds weird at first. Let's put that equation into slope-intercept form:

$x+3y=9\\3y=9-x\\y=3-\frac{1}{3}x\\y=-\frac{1}{3}x+3$

Equations like these can be real sneaky, so it's important not to jump to conclusions with them.

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3 years ago

Which of the following statements contain a variable? Check all that apply.

Roman55 [17]

B
Explanation:

A Variable is a symbol for a number we don't know yet. We don’t know the number of colors on the page.

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3 years ago