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OpenStudy (anonymous):
find the roots. 2x^2+4x-5=0 a.-2+- squrt 10/2 b.-2 +-sqrt 14/2 c.-4+- sqrt 14/4
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OpenStudy (anonymous):
b
OpenStudy (anonymous):
your discriminant is b^2-4ac=4^2-4*2*(-5)=16+40=56 x1,2=(-b+/-sqrt(D))2a=(-4 +/- sqrt56)/4 = (-4 +/- 2sqrt14)/2 = (-2 +/- sqrt14)/2
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