Seudónimo Seudónimo
  • 01-09-2016
  • Mathematics
contestada

Solve this equation using an algebraic method: (x + 4)( x - 4) = 9.

Please use your own answer :)

Respuesta :

Аноним Аноним
  • 01-09-2016
[tex]\star \ (x + 4)( x - 4) = 9.[/tex] 

[tex] \star \ x^2-4^2=9 [/tex]  [tex]Expand \ the \ given \ equation [/tex] 

[tex]\star [/tex]  [tex] x^2-16=9 [/tex] 

[tex]\star [/tex]  [tex] x^2=9+16 [/tex]  [tex]Combine \ like \ terms [/tex] 

[tex]\star [/tex]  [tex] x^2=25 [/tex] 

[tex]\star [/tex]  [tex]x= \sqrt{25}= \sqrt{5} [/tex] 

[tex]\star [/tex] [tex]x=5[/tex]

Answer Link

Otras preguntas

Select the correct answer. The authors of both editorials agree that A. the math league does well in most of its competitions. B. it is hard for Roosevelt to
The sets of data below show the heights, in inches, of students in two different preschool classes. A box plot titled Class 1. The number line goes from 38 to
Which type of land biome is created and/orsubstained by a rain shadow
Why do you think jazz became so popular in the 1920s?
Does the pronoun agree with its antecedent? The flock of geese flew behind their leader. Yes or no
NEED HELP ASAP!!!!!!
What is the mass in grams of 0.450 moles of magnesium sulfate, MgSO4?
What major event ended reconstruction in 1877
What happens when Dally, Johnny, and Ponyboy are at the Nightly Double? Describe Dally’s behavior. How does Ponyboy feel about it?
which statement about the quadratic equation below is true?