Question 1020078
a) {{{x^2=2}}}
{{{x=0 +- sqrt(2)}}}
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b){{{x^2-2=0}}}
{{{(x+0)^2=2}}}
{{{x+0=0 +- sqrt(2)}}}
{{{x=0 +- sqrt(2)}}}
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c){{{a=1}}}
{{{b=0}}}
{{{c=-2}}}
{{{x = (-0 +- sqrt( 0^2-4*1*(-2) ))/(2*1) }}} 
{{{x = (-0 +- sqrt( 8 ))/(2) }}} 
{{{x = (0 +- 2*sqrt( 2 ))/(2) }}}
{{{x = 0 +- sqrt( 2 )}}}