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Alina [70]
4 years ago
13

Difference of squares: What is x^2-9=0? please help me....​

Mathematics
2 answers:
Cloud [144]4 years ago
8 0

Answer:

3 or -3

Step-by-step explanation:

You need to factor it to be able to find the solution.

x^2-9=0

(x+3)(x-3)=0  You now need to find 'each' zero, because if one parenthesis equals 0, then you are multiplying the rest of the equation by 0 which will equal 0.

x+3=0  Subtract three

x= -3    

x-3=0  Add three

x= 3

x^2-9 will equal 0 when x is either +3 or -3

nevsk [136]4 years ago
8 0

Answer:

x=3  x=-3

Step-by-step explanation:

x^2-9=0

We know this is the difference of squares

a^2 - b^2 = (a-b) (a+b)

(x-3)(x+3) =0

Using the zero product property

x-3 =0  x+3 =0

x=3  x=-3

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Answer:

y=5x+31

Plot points at: (-4,11), (-6,1), (-3, 16)

Step-by-step explanation:

y-1=5(x+6)

y-1=5x+30

y=5x+31

4 0
3 years ago
he table shows the mean number of basketball goals made by four random samples of players from the school team during this year’
Strike441 [17]

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<h3>What is a sample mean?</h3>

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Here, the sample variance is a measure of the degree to which the numbers in a list are spread out. Here, the numbers given are close to each other.

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3 0
2 years ago
Rosetta drove her car 160 miles in 2 hours. Which of the following correctly expresses her rate as a ratio?
svp [43]

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7 0
3 years ago
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Www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNsikas
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Step-by-step explanation:

404 not found

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3 years ago
Can you Afford to Enlarge this?You each want to have a 3" X 5' picture ofprinted so that you canput it on your dartboard. It cos
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Given:

\text{ Dimension = 3}\times5

Sol:

Area of picture is:

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\begin{gathered} =15\times10 \\  \\ =150 \end{gathered}

If the quadruple of dimension that mean:

\begin{gathered} \text{ l ength = 4 length} \\  \\ Width\text{ = 4 width} \end{gathered}

So area is:

\begin{gathered} A=4\text{ length}\times4\text{ Width} \\  \\ A=4(15) \\  \\ A=60 \end{gathered}

So price is:

\begin{gathered} =60\times10 \\  \\ =600 \end{gathered}

3 0
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