H heya27 New member Joined Oct 31, 2011 Messages 1 Oct 31, 2011 #1 Solve the equation 4x^2+5=-7 Solve the equation 4x^2=20=0 And how do I get the answer so I can write it in standard form?
Solve the equation 4x^2+5=-7 Solve the equation 4x^2=20=0 And how do I get the answer so I can write it in standard form?
pka Elite Member Joined Jan 29, 2005 Messages 11,978 Oct 31, 2011 #2 heya27 said: Solve the equation 4x^2+5=-7 Solve the equation 4x^2=20=0 Click to expand... If \(\displaystyle 4x^2+5=-7\) then \(\displaystyle x^2=-3\) So \(\displaystyle x=\pm\sqrt{3}\,\mathif{i}\).
heya27 said: Solve the equation 4x^2+5=-7 Solve the equation 4x^2=20=0 Click to expand... If \(\displaystyle 4x^2+5=-7\) then \(\displaystyle x^2=-3\) So \(\displaystyle x=\pm\sqrt{3}\,\mathif{i}\).
