For the function shown below, find f(3): f(x)=2x^4-8x^2+5x-7

• beckafaithbrant: 98 is your answer plug the three in for any x value
• :

  We have been given the function

  [tex]f(x)=2x^4-8x^2+5x-7[/tex]

  We have to find the value of f(3). In order to find the same, substitute x=3 in the given function.

  [tex]f(3)=2(3)^4-8(3)^2+5(3)-7[/tex]

  Now, we simplify this step by step.

  First of all [tex]3^4=81\text{ and }3^2=9[/tex]. Thus, we have

  [tex]f(3)=2\times 81 -8\times 9+5(3)-7[/tex]

  Now, we can easily simplify it by PEMDAS

  [tex]f(3)=162-72+15-7[/tex]

  [tex]f(3)=98[/tex]

  
  

  Therefore, the value of f(3) is 98.