Question 1077870
roots are :
{{{x[1]=-4}}} and {{{x[2]=1}}}

and, leading coefficient is {{{a=2}}}


{{{y=a(x-x[1])(x-x[2])}}}

{{{y=2(x-(-4))(x-1)}}}

{{{y=2(x+4)(x-1)}}}

{{{y=2(x^2-x+4x-4)}}}

{{{y=2(x^2+3x-4)}}}

{{{y=2x^2+6x-8}}}


{{{ graph( 600, 600, -15, 15, -15, 15, 2x^2+6x-8) }}}