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If the quadratic equation x2 + 4x + k = 0 has real and equal roots, then |
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Answer» SolutionverifiedVerified by Topprx 2 −4x+k=0 is of the form ax 2 +bx+c=0 where a=1b=−4c=kRoots are equal⇒ Discriminant=0⇒b 2 −4ac=0⇒(−4) 2 −4×1×k=0⇒16−4k=0⇒−4k=−16∴k= 416\u200b =4Solve any question of Quadratic Equations with:- a=1,b=4,c=kd=b^2-4ac0=4^2-4×1×k0=16-4k-4k=-16k=16/4=4 |
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