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Verified answer
Y = 2x² + 5x - 12y = kx - 14
Subtitusi keduanya
2x² + 5x - 12 = kx - 14
2x² + (5 - k)x + 2 = 0
a = 2 , b = 5 - k , c = 2
Berpotongan di satu titik , D = 0
b² - 4ac = 0
(5 - k)² - 4(2)(2) = 0
k² - 10k + 25 - 16 = 0
k² - 10k + 9 = 0
(k - 1)(k - 9) = 0
k = 1 atau k = 9