Menyelesaikan 2(x)^(4)-19(x)^(2)+31x+21 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$2 { x }^{ 4 } -19 { x }^{ 2 } +31x+21$$