Abairtean ailseabrachDè chaidh iarraidh ort a dhèanamh?

\(f(x) = 2{x^4} + 9{x^3} - 18{x^2} - 71x - 30\)

Factaraich \(f(x)\) gu lèir

\(\Rightarrow (x + 2)(x - 3)(x + 5)(2x + 1)\)

Fuasgail \(f(x) = 0\)

\(\Rightarrow x = - 2,x = 3,x = - 5,x = - \frac{1}{2}\)

Obraich a-mach na freumhan aig \(f(x)\)

\(\Rightarrow x = - 2,x = 3,x = - 5,x = - \frac{1}{2}\)

Càit a bheil \(f(x)\) a' gearradh an \(x\)-axis?

\(\Rightarrow ( - 2,0),(3,0),( - 5,0),\left( { - \frac{1}{2},0} \right)\)