if one of the quadratic polynomial is bracket - 2 bracket close x square - 2 x minus K + 5 is 4
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X = 4
P ( x ) = X² - 2X - K + 5
P (4) = (4)² - 2 × 4 - K + 5
=> 16 - 8 - K + 5 = 0
=> -K + 3 = 0
=> -k = -3
=> k = 3
X = 4
P ( x ) = X² - 2X - K + 5
P (4) = (4)² - 2 × 4 - K + 5
=> 16 - 8 - K + 5 = 0
=> -K + 3 = 0
=> -k = -3
=> k = 3
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