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

When 27x2z/-3x2z6 is completely simplified, the exponent on the variable z is
what is the main source of campaign funds
write an opening paragraph on the opposing side of "Should college athletes be paid to play?" , using a hook, bridge, and thesis statement. PLEASE HELP
beau's recipe for granola bars calls for 3 1/2 cups of oatmeal. he only has a 1/6 cup scoop. how many scoops of oatmeal will he need for the recipe.
helppppppp desperateeeeeee pleaseeeeeeee need steps for long division​
Help with maths question please
Find the surface area of the cone. Use 3.14 to approximate pi. Round your answer to the nearest hundredth.
How to solve that question?
Which inequality and solution represent keeping the area of a triangle under 36 square feet if the height is twice the length of base b
the collapse of the USSR had a strong negative effect on which of the following Nations​