Question 899467
{{{t^2+8t-16=0}}} and not a perfect square trinomial.


Discriminant, {{{8^2-4*1*(-16)=64+4*16=128}}}
{{{128=64*2=8^2*2}}}


{{{t=(-8+- sqrt(2*8^2))/2}}}
{{{t=(-8+- 8sqrt(2))/2}}}
{{{highlight(t=-4+- 4*sqrt(2))}}}