Question 838361
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{{{-16t^2+50t+4=40}}}
{{{-16t^2+50t+4-40=0}}}
{{{-16t^2+50t-36=0}}}
{{{8t^2-25t+18=0}}}
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discriminant is {{{highlight(25^2-4*8*18=49)}}}
{{{t=(25+- 7)/(2*8)}}}, TWO POSITIVE VALUES.
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Continuing, {{{t=(25+- 7)/16}}}
{{{t=9/8}}} or {{{t=2}}}
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What goes up also comes down.