If roots of the quadratic equation

3y²+k y +12=0

are real and equal

then find k

### 1 thought on “<br />If roots of the quadratic equation<br />3y²+k y +12=0<br />are real and equal<br />then find k”

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Let[tex]a=3[/tex],[tex]b=k[/tex],[tex]c=12[/tex]in[tex]3y^2+ky+12=0[/tex].[tex]b^2-4ac=0[/tex]we are given that.so,[tex]k^2-2(3)(12)=0[/tex][tex]k^2=6*6*2=6^2*2[/tex]now,∴ equation is as follows:-[tex]3y^2+6\sqrt{2} y+12=0[/tex]