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3 years ago

(9x+7)(9x-7) what's the answer

Mathematics

2 answers:

MrRa [10]3 years ago

8 0

They cancel each other out because one is + and the other is -.

EastWind [94]3 years ago

4 0

81x^2 - 49. The middle terms cancel out because of the opposing signs, but the answer is 81x^2 - 49

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Use the properties of logarithms to prove log, 1000 = log2 10.

Leto [7]

Given:

Consider the equation is:

$\log_81000=\log_210$

To prove:

$\log_81000=\log_210$ by using the properties of logarithms.

Solution:

We have,

$\log_81000=\log_210$

Taking left hand side (LHS), we get

$LHS=\log_81000$

$LHS=\dfrac{\log 1000}{\log 8}$ $\left[\because \log_ab=\dfrac{\log_x a}{\log_x b}\right]$

$LHS=\dfrac{\log (10)^3}{\log 2^3}$

$LHS=\dfrac{3\log 10}{3\log 2}$ $[\because \log x^n=n\log x]$

$LHS=\dfrac{\log 10}{\log 2}$

$LHS=\log_210$ $\left[\because \log_ab=\dfrac{\log_x a}{\log_x b}\right]$

$LHS=RHS$

Hence proved.

6 0

3 years ago

I am not irrational, I am an integer, I am a natural number, and I am a prime number. What number am I?

LuckyWell [14K]

Answer:

I think 1

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The product of the page numbers on two facing pages of a book is 110. find the page numbers.

iren2701 [21]

The page numbers are 10 and 11

6 0

3 years ago

Svetradugi [14.3K]

Answer:

yes

Step-by-step explanation:

yes

6 0

3 years ago

What is the value of log subscript 6 baseline startfraction 1 over 36 endfraction? –6 –2 2 6

EleoNora [17]

The value of log subscript 6 baseline start fraction 1 over 36 end fraction is -2.

Let x is the unknown value

We have to determine the value of x

$Log_6 ( 1/36) = x....Given$

<h3>What is the meaning of logarithmic function?</h3>

Logarithmic functions are the inverses of exponential functions, and an exponential function can be expressed in logarithmic form.

$( 1/36) = 36^{-1} = (6^{2})^{-1} = 6^{-1}$

$Log_6( 1/36) = Log_6 6^{-2} = -2 Log_6 6$

We know that,

$log_aa=1$

Therefore by applying the above rule of log we have

$Log_6 6 = 1$

Therefore we get

$-2 Log_6 6 = -2(1) = -2$

Therefore option 2 is correct.

To learn more about the logarithmic expression visit:

brainly.com/question/1832186

6 0

2 years ago

Read 2 more answers