Question 144973

{{{f(x)=2x^3-x^2-4x+9}}} Start with the given function



{{{f(4)=2(4)^3-(4)^2-4(4)+9}}} Plug in {{{x=4}}}



{{{f(4)=2*64-4^2-4*4+9}}} Raise 4 to the 3rd power to get 64



{{{f(4)=128-4^2-4*4+9}}} Multiply 2 and 64 to get 128



{{{f(4)=128-16-4*4+9}}} Raise 4 to the 2nd power to get 16



{{{f(4)=112-4*4+9}}} Subtract 16 from 128 to get 112



{{{f(4)=112-16+9}}} Multiply 4 and 4 to get 16



{{{f(4)=96+9}}} Subtract 16 from 112 to get 96



{{{f(4)=105}}} Add 96 and 9 to get 105