samcyal samcyal
  • 04-04-2018
  • Mathematics
contestada

Which method is best to factor f(x) = x^2 - 81?

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 04-04-2018
use difference of 2 perfect squares

remember that [tex]a^2-b^2=(a-b)(a+b)[/tex]

so
[tex]x^2-81=[/tex]
[tex]x^2-9^2=[/tex]
[tex](x-9)(x+9)[/tex]
there, factored
Answer Link
AnimeBrainly
AnimeBrainly AnimeBrainly
  • 10-08-2018

Use the difference of perfect squares

f(x) = x^2 - 81

f^2 - 81 = (f x -9), (f x 9)

f(f) = f^2 , f(-9) = -9f , f(9) = 9f , -9(9) = -81

(f(-9)), (f(9)) is your factors

hope this helps

Answer Link

Otras preguntas

Can someone answer this question
The study of body function in a disease state is The study of body function in a disease state is histology. pathophysiology. necrology. microbiology. physiolog
What is not a role of the president
If a speeding train hits the brakes and it takes the train 39 seconds to go from 54.8 m/s to 12 m/s what is the acceleration?
Help with the answer
Point B is 2/3 the way from A(-2,5)to C(4,-4). Find the location of B Please please help and show steps!!!!
how does the glass window help to reduce the number of accidents
Write the whole number 7420 in expanded form
18. Which type of briefing is delivered to individual resources or crews who are assigned to operational tasks and/or work at or near the incident site?
Please help. History is more important for individuals than it is for groups. True or false?