Question

A_CDEFG
JO BHI BLANK KA ANSWER DEGA USKO MELEGE 58 POINTS LOOT LO POINTS
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Answer 1

Explanation:

Answer:

k = 2 or -1/2

Step-by-step explanation:

Δ = 1/2| x₁(y₂ - y₃) + x₂(y₃ - y₁) + x₃ ( y₁ - y₂) |

   => 1/2| (k+1)(3-2k) + (2k+1)(2k-1) + (2k+2)(1-3)| = 0

   => 1/2| 3k + 3 - 2k² - 2k + 4k² - 1 - 4k - 4|

   => 1/2| 2k² - 3k -2| = 0

   => 2k² - 3k - 2 = 0

   => 2k² - 4k + k - 2 = 0

   => 2k(k - 2) + 1(k - 2) = 0

   => (k - 2)(2k + 1) = 0

   => k = 2 or -1/2

Answer 2

Answer:

k = 2 or -1/2

Step-by-step explanation:

Δ = 1/2| x₁(y₂ - y₃) + x₂(y₃ - y₁) + x₃ ( y₁ - y₂) |

  => 1/2| (k+1)(3-2k) + (2k+1)(2k-1) + (2k+2)(1-3)| = 0

  => 1/2| 3k + 3 - 2k² - 2k + 4k² - 1 - 4k - 4|

  => 1/2| 2k² - 3k -2| = 0

  => 2k² - 3k - 2 = 0

  => 2k² - 4k + k - 2 = 0

  => 2k(k - 2) + 1(k - 2) = 0

  => (k - 2)(2k + 1) = 0

  => k = 2 or -1/2

THANKS  

Explanation: