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Zepler [3.9K]
3 years ago
12

How would the expression x^2-9 be written using difference of swuares

Mathematics
2 answers:
Alex73 [517]3 years ago
8 0

Answer:

(x-3)(x+3)

Step-by-step explanation:

Here we have to represent our algebraic expression as difference of square.

In order to do so we have use the formula given under.

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

Hence first we have to guess the square root of the 9 , which is 3 and represent our numeric term in our expression as square of it.

Hence

(x^2-9)\\= (x^2-3^2)

Now we apply the formula

(x^2-3^2)=(x-3)(x+3)

Hence the above expression is our answer.

Ludmilka [50]3 years ago
4 0
<h3>(x+3)(x-3)</h3>

x squared and -9 are both square numbers.

the square root of x^2 is x

the square root of -9 is 3. so you just need to write (x+3)(x-3)

you can check by expanding the brackets and the middle x terms should cancel out

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Which values of m and b will create a system of equations with no solution? Select two options.
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Answer:

2nd and 5th options

Step-by-step explanation:

the solution to a system of equations is at the point of intersection of the 2 lines.

If the lines are parallel then they never intersect and will have no solution.

The slopes m of parallel lines are equal.

The options with equal slopes , both - 2 are the

2nd and 5th options

6 0
3 years ago
What improper fraction can be written as a whole number. 10/6 12\6 14\6 16\6?
Burka [1]
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4 years ago
The length of the arc of one quadrant is equivalent to theâ _____ of a 90 degrees bend.
Ira Lisetskai [31]

Answer:

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Step-by-step explanation:

A developed length is the length along the centre line of a circular shape.

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1 quadrant = 90°

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So, it's safe to say 1 quadrant = the degree of bend = 90°

A small change in 90° will move change the quadrant to another quadrant.

So, at exactly 90° (or other multiples of 90° which are 180°, 270° and 360°), it is at its developed length.

8 0
4 years ago
35 students planned to walk in a fund raiser. The ratio of girls to boys is 5 to 2. How many boys are there?
Molodets [167]

Answer:

13

Step-by-step explanation:

   13

2/35

  2  {

------{-

 1  5

 1  5

----------

     0

5 0
3 years ago
What is the algebraic expression for the difference of 17 and 5 times a number?
Fudgin [204]
<span>
</span><span>the difference of 17     ( 17 -
</span><span>5 times a number        5n 
</span>
17 - 5n 
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