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3 years ago

CAN SOMEONE PLEASE HELP ME!!! I’ll mark brainliest

Mathematics

2 answers:

kramer3 years ago

7 0

3 one is correct answer

Grace [21]3 years ago

5 0

Answer:

im pretty sure its the 3rd one

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Select the two values of x that are roots of this equation. 2x^2+ 1 = 5x

iren [92.7K]

Answer:

$\frac{5+\sqrt{17}}{4}$ , $\frac{5-\sqrt{17}}{4}$

Step-by-step explanation:

One is asked to find the root of the following equation:

$2x^2+1=5x$

Manipulate the equation such that it conforms to the standard form of a quadratic equation. The standard quadratic equation in the general format is as follows:

$ax^2+bx+c=0$

Change the given equation using inverse operations,

$2x^2+1=5x$

$2x^2-5x+1=0$

The quadratic formula is a method that can be used to find the roots of a quadratic equation. Graphically speaking, the roots of a quadratic equation are where the graph of the quadratic equation intersects the x-axis. The quadratic formula uses the coefficients of the terms in the quadratic equation to find the values at which the graph of the equation intersects the x-axis. The quadratic formula, in the general format, is as follows:

$\frac{-b(+-)\sqrt{b^2-4ac}}{2a}$

Please note that the terms used in the general equation of the quadratic formula correspond to the coefficients of the terms in the general format of the quadratic equation. Substitute the coefficients of the terms in the given problem into the quadratic formula,

$\frac{-b(+-)\sqrt{b^2-4ac}}{2a}$

$\frac{-(-5)(+-)\sqrt{(-5)^2-4(2)(1)}}{2(2)}$

Simplify,

$\frac{-(-5)(+-)\sqrt{(-5)^2-4(2)(1)}}{2(2)}$

$\frac{5(+-)\sqrt{25-8}}{4}$

$\frac{5(+-)\sqrt{17}}{4}$

Rewrite,

$\frac{5(+-)\sqrt{17}}{4}$

$\frac{5+\sqrt{17}}{4}$ , $\frac{5-\sqrt{17}}{4}$

8 0

2 years ago

How do I give a Brainliest to somebody?

Dominik [7]

Answer:

there have to be at least two answers, then you have the option to mark brainliest by pressing the crown

Step-by-step explanation:

Hope this helps!

6 0

2 years ago

Read 2 more answers

Which number is greatest? O 2.89 x 10 O 1.997x102 O 8.9x104 O 5x10

seropon [69]

Answer:

Step-by-step explanation:

you just multiply in the calculator

8 0

3 years ago

A hose with a larger diameter working alone can fill a swimming pool in 9 hours. A hose with a smaller diameter working alone ca

Vilka [71]

- The rate of the hose with the large diameter is:

Answer: A). 1/9.

- What is the unknown in the problem?

Answer: C). the time it takes for the hoses working together to fill the pool

-What part of the job does the hose with the large diameter do?

Answer: B). x/9

4 0

2 years ago

What is the equation of a parabola with a vertex at (0, 0) and a focus at (0, 3).

Ivenika [448]

Nice, so

parabola equation is
4P(x-h)=(y-k)^2 (sideways parabola) or
4P(y-k)=(x-h)^2 (up and down parabola)

it is a vertical parabola since the focus is directly above the vertex
P is the distance from the vertex to the focus which is 3
it is positive since the focus is above it
4(3)(y-k)=(x-h)^2
(h,k) is the vertex
vertex is 0,0
4(3)(y-0)=(x-0)^2
12y=x^2
y=(x^2)/12

6 0

2 years ago

Read 2 more answers