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Arada [10]
2 years ago
9

Identify the solutions to the quadratic equation. Check all that apply. x2 + 4x - 21 = 0

Mathematics
2 answers:
Vika [28.1K]2 years ago
8 0

Answer:

C and D

Step-by-step explanation:

(X-3)(X+7)=0

X-3=0   X+7=0

X=3  X=-7

soldier1979 [14.2K]2 years ago
5 0

Answer:

6, -7 ; C and D

Step-by-step explanation:

(-4 +/- √16+84)/2=x

(-4 +/- 10)/2=x

x=6/2=3, or x=-14/2= -7

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30 miles per gallon

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most fuel efficient is Jean's car....it gets 30 miles per gallon

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2 years ago
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In 2/5 hour, Matt can type 4/5 page. What is Matt's rate in pages per hour?
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Make doubles.add. 5+6 __+_+_ so,5+6=11
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Is it true that if two angles with measures that sum to 180 that they are linear pairs?
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F(x)=x-1/x^2-x-6 which is the graph of
hoa [83]

Answer:

The graph is attached below.

Step-by-step explanation:

<em>As you have not added the graph, so I will be solving the function for a graph.</em>

Given the function

f\left(x\right)=x-\frac{1}{x^2}-x-6

x-\mathrm{axis\:interception\:points\:of\:}-\frac{1}{x^2}-6:

\mathrm{x-intercept\:is\:a\:point\:on\:the\:graph\:where\:}y=0

-\frac{1}{x^2}-6=0

-1-6x^2=0

\mathrm{No\:Solution\:for}\:x\in \mathbb{R}

\mathrm{No\:x-axis\:interception\:points}

y-\mathrm{axis\:interception\:point\:of\:}-\frac{1}{x^2}-6:

y\mathrm{-intercept\:is\:the\:point\:on\:the\:graph\:where\:}x=0

As we know that the domain of a function is the set of input or argument values for which the function is real and defined.

\mathrm{Domain\:of\:}\:-\frac{1}{x^2}-6\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x0\:\\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:0\right)\cup \left(0,\:\infty \:\right)\end{bmatrix}

\mathrm{Since}\:x=0\:\mathrm{is\:not\:in\:domain}

\mathrm{No\:y-axis\:interception\:point}

\mathrm{Asymptotes\:of}\:-\frac{1}{x^2}-6:\quad \mathrm{Vertical}:\:x=0,\:\mathrm{Horizontal}:\:y=-6

\mathrm{Range\:of\:}-\frac{1}{x^2}-6:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)

The graph is attached below.

5 0
3 years ago
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