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Leno4ka [110]
3 years ago
10

Simplify (3a+2)(3a-2)​

Mathematics
1 answer:
Scrat [10]3 years ago
6 0
The answer would be 9a^2-4
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Find the solution of ×\2-1/5=×\3+1/4 please help me with this​
ale4655 [162]

Answer:

x=\frac{27}{10}

Step-by-step explanation:

Assuming that the beginning equation is \frac{x}{2} -\frac{1}{5} =\frac{x}{3} +\frac{1}{4}

First, we should find the common denominator of each of fractions. For all of these denominators, 60 is the smallest common denominator

\frac{x}{2}(\frac{30}{30})  -\frac{1}{5}(\frac{12}{12})  =\frac{x}{3}(\frac{20}{20})  +\frac{1}{4} (\frac{15}{15}) \\\\\frac{30x}{60}-\frac{12}{60} =\frac{20x}{60}+\frac{15}{60}

Now, we can multiply each side by 60, which will remove the fractions

30x-12=20x+15

Now we can add 12 to each side

30x=20x+27

Now subtract 20x from each side

10x=27

And lastly, divide each side by 10

x=\frac{27}{10}

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%7B2%7D%5E%7Bm%7D%20%20%3D%20n%20" id="TexFormula1" title=" {2}^{m} = n " alt=" {2}^{m} =
sveta [45]

Answer:

\displaystyle n^3-\frac{1}{n^{2}}

Step-by-step explanation:

<u>Exponents Properties</u>

We need to recall the following properties of exponents:

(a^x)^y=(a^y)^x=a^{xy}

\displaystyle a^{-x}=\frac{1}{a^x}

We are given the expression:

2^m=n

We need to express the following expression in terms of n.

8^m-4^{-m}

It's necessary to modify the expression to use the given equivalence.

Recall 8=2^3 \text{ and }4 = 2^2. Thus:

(2^3)^m-(2^2)^{-m}

Applying the property:

(2^m)^3-(2^m)^{-2}

Substituting the given expression:

n^3-n^{-2}

Or, equivalently:

\mathbf{\displaystyle 8^m-4^{-m}= n^3-\frac{1}{n^{2}}}

5 0
3 years ago
Which inequality matches the graph?<br> A<br> 12 B<br> 12&gt;<br> c<br> 12x<br> D<br> 12 5x
never [62]
The answer is 60 I think
7 0
3 years ago
Lina and Josh each made a factor tree to find the prime factorization of 126.
katen-ka-za [31]
The prime factorization of 126 is <span>2 x 3 x 3 x 7.</span>
3 0
3 years ago
Read 2 more answers
PLZ HELP WILL MARK BRAINLIEST
sweet-ann [11.9K]

Answer:

2.8 units

You should get 2√(2) or √(8) which is less than 3 and greater than 2.

8 0
3 years ago
Read 2 more answers
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