हल करना (x)^(3)+9(x)^(2)+15x-21=0 | 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

$${ x }^{ 3 } +9 { x }^{ 2 } +15x-21=0$$