Question 173086


{{{-2x^4-3x^2+5x-9}}} Start with the given expression.



{{{-2(2)^4-3(2)^2+5(2)-9}}} Plug in {{{x=2}}}.



{{{-2(16)-3(2)^2+5(2)-9}}} Raise  {{{2}}} to the 4th power to get {{{16}}}.



{{{-2(16)-3(4)+5(2)-9}}} Square {{{2}}} to get {{{4}}}.



{{{-32-3(4)+5(2)-9}}} Multiply {{{-2}}} and {{{16}}} to get {{{-32}}}.



{{{-32-12+5(2)-9}}} Multiply {{{-3}}} and {{{4}}} to get {{{-12}}}.



{{{-32-12+10-9}}} Multiply {{{5}}} and {{{2}}} to get {{{10}}}.



{{{-43}}} Combine like terms.




So {{{-2x^4-3x^2+5x-9=-43}}} when {{{x=2}}}