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

Based on the Supremacy Clause, which must US judges support?-state laws-state and federal laws-the Constitution-the Bill of Rights
which argument was used by president abraham lincoln to explain his policy of leniency toward the south after the civil war
(1 pt) Which graphs show the solution to the given inequalities? Column A Column B 1. 2. 3. 4. A. Number line with positive and negative numbers.
Improving muscular strength and endurance slows bone density loss.
what are 3 major events that occured in 1922 ?
Your_ reflects your talents, abilities , and education
Can someone help? 12x−2y=8 not in a faction and not is a decimal.
Which example is not a structural adaptation of an animal? A. Fur color varies with the season for protection. B. Colorful peacock feathers attract a female.
what's the nearest tenth of 1.91
Which statement best describes the formation of diamonds? A. Diamonds form in kimberlites under very low pressure. B. Diamonds form in kimberlites under very h