Question
What are the values of k, if the roots of the equation
x² + 2(k - 4)x + 2k = 0 are equal?Solution
Given, the roots of the equation x² + 2(k - 4)x + 2k = 0 are equal. When roots are equal then b² = 4ac ⇒ [2(k - 4)]² = 4 * 1 * 2k ⇒ 4(k - 4)² = 8k ⇒ k² - 8k + 16 = 2k ⇒ k² - 10k + 16 = 0 ⇒ (k - 2) (k - 8) = 0 ⇒ k = 2, 8
निम्नलिखित प्रश्नों में, प्रश्नवाचक चिन्ह(?) के स्थान पर ल�...
After 3 years, B’s age will be?
How many seats are between P and O when counted from the left of O?
Below is given the last step of an input. What will be its second step?
Last Step: 51 69 87 93 49 56 77 70
Statements :
No letter is an alphabet.
Some alphabets are digits.
Some digits are numbers.
Conclusions : �...
How many meaningful English words can be formed from interchanging first and second letters of each word given in the series?
मनीष 3 मार्च 1980 को पैदा हुआ था। संजीव , मनीष से 4 दिन पहले पैदा...
- Meena is eight years older than Sita. Eight years ago, three times the age of Sita is 15 more than the age of Meena. Find the present age of Sita.
Select the option that is related to the third word in the same way the second word is related to the first word.
Thrift: Frugal :: Ailment: ?<...
What is the largest common divisor of the numbers 1170, 2340, and 3510?
Relevant for Exams:
