Question 180847
{{{(z-6)^2-40=0}}}
{{{(z-6)^2=40}}}
{{{z-6 = 0 +- sqrt(40) }}}
{{{z=6 +- 2*sqrt(10)}}}
Approximately z=12.32, -0.32.
{{{ graph( 300, 300, -4, 16, -20, 20, (x-6)^2-40) }}}
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{{{2x^2+7x+2=0}}}
Use the quadratic formula,
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-7 +- sqrt( 7^2-4*2*2 ))/(2*2) }}}
{{{x = (-7 +- sqrt( 49-16 ))/(4) }}}
{{{x = (-7 +- sqrt( 33 ))/(4) }}}
Approximately, x=-3.18,-0.31
{{{ graph( 300, 300, -7, 3, -5, 5, 2*x^2+7*x+2) }}}
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Are those the oddball numbers you were getting??