if one zero of the quadratic polynomial is ( K - 2)
x square - 2 x minus (K + 5) is 4
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Hey !!
X = 4
P ( x ) = ( K - 2 )X² - 2X - K - 5
P (4) = ( K - 2 ) (4)² - 2 × 4 - K - 5
=> ( K - 2 ) 16 - 8 - K - 5 = 0
=> 16K - 32 - 8 - K - 5 = 0
=> 15K - 45 = 0
=> 15K = 45
=> K = 45/15
=> K = 3
X = 4
P ( x ) = ( K - 2 )X² - 2X - K - 5
P (4) = ( K - 2 ) (4)² - 2 × 4 - K - 5
=> ( K - 2 ) 16 - 8 - K - 5 = 0
=> 16K - 32 - 8 - K - 5 = 0
=> 15K - 45 = 0
=> 15K = 45
=> K = 45/15
=> K = 3
stphencurry:
very happy
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