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2 years ago

7

Which of the following could be the number of real roots, including any repeated roots, of a quadratic polynomial with real coef

ficients? Select all possible answers.
0

4

5

6

1 answer:

scoray [572]2 years ago

5 0

I think the only answer here is 0
Idk tho

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Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations.

Nostrana [21]

$x^3-27i=0$
$x^3=27i$
$x^3=27e^{i\pi/2}$
$x=\left(27e^{i\pi/2}\right)^{1/3}$
$x=3e^{i(\pi/2+2\pi k)/3}$
$x=3e^{i\pi(4k+1)/6}$

where $k\in\{0,1,2\}$ . This means you have

$x=3e^{i\pi/6}=\dfrac32(\sqrt3+i)$
$x=3e^{i5\pi/6}=\dfrac32(-\sqrt3+i)$
$x=3e^{i9\pi/6}=-3i$

as the solutions to the original equation.

4 0

2 years ago

What must m∠QPS be for PQRS to be a parallelogram?

solmaris [256]

Answer:

18

Step-by-step explanation:

5 0

2 years ago

What is the slope of a line that contains the points (5, -3) and (7, 3)? *

Allisa [31]

Slope formula: y2-y1/x-x1

We can use the given points to solve.

3-(-3)/7-5

6/2

3

Best of Luck!

4 0

2 years ago

4x -5 = 2(2x +1)<br> I need help

Nostrana [21]

Answer:

No Solution

Step-by-step explanation:

$4x-5=2\left(2x+1\right)$

Expand:

$4x-5=2* \:2x+2* \:1$

$4x-5=4x+2$

Add 5 to both sides:

$4x-5+5=4x+2+5$

$4x=4x+7$

Subtract 4x from both sides:

$4x-4x=4x+7-4x$

$0=7$

No solution as this is false.

4 0

2 years ago

Read 2 more answers

6% greater than or less than 48%

elena-s [515]

6% is less than 48%. Due to the reason that 48% is a larger portion.

3 0

2 years ago

Read 2 more answers