Question 33690
{{{2(x^5)-(x^4)-4(x^3)+2(x^2)-30(x)+15}}}
{{{(x^4)(2x-1)-2(x^2)(2x-1)-15(2x-1)}}}
(2x-1)[{{{(x^4)-2(x^2)-15}}}]
(2x-1)[{{{(x^4)-5(x^2)+3(x^2)-15}}}]
(2x-1)[{{{(x^2)(x^2-5)+3(x^2-5)}}}]
(2x-1){{{(x^2+3)(x^2-5)}}}
to find zer0 of this polynomial:
(2x-1){{{(x^2+3)(x^2-5)}}} = 0
(2x-1) = 0 
2x = 1     
x = 1/2         



or {{{(x^2+3)}}} = 0 
{{{x^2}}} = -3
x = plus or minus {{{sqrt(3)}}}


or
{{{(x^2 - 5 )}}} = 0
{{{x^2}}} = 5
x = plus or minus {{{sqrt(5)}}}