Find the discriminant of the quadratic equation -12x^2 + 5x + 2 = 0 ?

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Answer 1 · 2018-02-28T19:54:27

#11#

The discriminant of a quadratic equation in the form

#ax^2+bx+c#

is given by

#sqrt(b^2-4ac)#

For #-12x^2+5x+2,# we see #a=-12,b=5,c=2#

Plugging in into #sqrt(b^2-4ac)#, we get

#sqrt(5^2-(4)(2)(-12))=sqrt(25+96)=sqrt(121)#

#sqrt(121)=11#