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For what value of k the root of the equation x2+4x+k=0 are real

Posted by Aman Upadhyay 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Mayank Sharma 6 years, 4 months ago

b²-4ac=0. 4²-4×1×k=0. 16-4k=0. 16=4k. 16÷4=k . 4=k.

1Thank You

Suniksha Bhatia 6 years, 4 months ago

Value of k must be less or equal to 4

0Thank You

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CBSE > Class 10 > Mathematics