Question 399884
{{{2(x^2-8x+16)=13}}}
{{{2x^2-16x+32=13}}}
{{{2x^2-16x+32-13=0}}}
{{{2x^2-16x+19=0}}} 
a=2, b=-16, c=19
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
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{{{x = (16 +- sqrt( 256-4*2*19 ))/(2*2) }}}
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{{{x = (16 +- sqrt( 256-152 ))/(4) }}} 
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{{{x = (16 +- sqrt( 104 ))/(4) }}} 
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{{{x = (16 +- 2sqrt( 26 ))/(4) }}} 
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{{{x = 2(8 +- sqrt( 26 ))/(4) }}}
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{{{x = (8 +- sqrt( 26 ))/(2) }}} 
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{{{x = 4 +- (sqrt( 26 ))/(2) }}}