11-06-2017
Mathematics

contestada

Solve log(base 2) (x+1) + log (base 2) (x-5)= 4

Respuesta :

akaleti47 akaleti47

11-06-2017

(x+1)(x-5)= 2^4=16

x^2 -4x -5 =16

x^2-4x-21=0

x= -3 or 7
but we would choose 7 as the answer as -3 gives negative value at (x+1) and we know that log of negative number is not defined.

Answer Link

Otras preguntas

What is chemical formula for cos?

When a number is increased by 5.5%, the result is 60. What is the original number to the nearest tenth?

Compare the standard of living in Greenland to the standard of living in the United states. Write at least 3 to 5 sentences.

There are 99 males and 121 females participating in a marathon what percent of the participants are females

Solve this question I don't get it

What are the three physical things that can reduce the chances of injury while catching a fastball.

The sum of a number and 3 more than twice the number is less than 36. Find the number

The belief that leadership qualities can be developed within the individual Marine, and that leaders have the responsibility for developing those qualities is t

$5.40 is what percent of $4.50? I I will give braniest ❤️

Profit is only a liability for the business. Can you justify this?