Question 1039204
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factors of -15=-8x2+2x
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<pre>
{{{-15}}} = {{{-8x^2 + 2x}}},

{{{8x^2 - 2x - 15}}} = {{{0}}},

{{{x[1,2]}}} = {{{(2 +- sqrt(4 + 4*8*15))/16}}} = {{{(2 +- sqrt(484))/16}}} = {{{(2 +- 22)/16}}}.

{{{x[1]}}} = {{{24/16}}} = {{{3/2}}},  {{{x[2]}}} = {{{-20/16}}} = {{{-5/4}}}.


Factorization:  {{{8x^2 - 2x - 15}}} = {{{8(x-3/2)*(x+5/4)}}} = (2x-3)*(4x+5).
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