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Question

Solve the following quadratics 21x2+9x+1=0


Solution

21x2+9x+1=0Comparing the given, equation with the general formax2+bx+c=0,wegeta=21,b=9,c=1Substituting a and b in,α=b+b24ac2a andβ=bb24ac2aα=9+818442 and β=9818442α=9+342 and β=9342α=9+i342 and β=9i342The roots arex=942±i342

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