Find all the real zeros of the polynomial function.

{eq}f(x)=6x^3-5x^2+24x-20 {/eq}

Question:

Real Roots of Cubic Polynomial:

When a symbol A represents a positive integer value and written in the square root with a negative sign (such as {eq}\sqrt{-A} {/eq}), then the expression will be simplified by the property of square root and an imaginary number.

{eq}\sqrt{-A}=\sqrt{-1}\cdot \sqrt{A}\\[2ex] \sqrt{-1}=i {/eq}

• Where {eq}i {/eq} represents an imaginary value.

Answer and Explanation: