Question 1157889
 {{{P(x) = x^3 + 2x^2 -14x-40}}}

{{{P(x) = (x -4) (x^2 + 6x + 10)}}}........use quadratic formula to find complex roots

=> {{{x = -3 -i}}} and  {{{x = -3 + i}}}

=> root product: {{{(x -( -3 - i))}}}=>{{{(x -( -(3 + i)))}}}=>{{{(x +(3 + i))}}}
and {{{(x -( -3+ i))}}}=>{{{(x -( -(3 - i)))}}}=>{{{(x +(3 -i))}}}


{{{P(x) =(x - 4)(x + (3 - i)) (x + (3 + i))}}}