Question

Find the value of k where X2+kx=2x-9

Answer 1

Answer:

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Answer 2

Answer:

k = 8

Step-by-step explanation:

x2 + kx = 2x - 9

x2 + kx - 2x + 9 = 0

x2 + x ( k  -2 ) + ( 3 ) 2 = 0

Above equation is in a2 + 2ab + b2 = 0 format, where a = x, b = 3

By equating curresponding terms,

2ab = x ( k - 2 )

2 ( x ) ( 3 ) = x ( k - 2 )

6x = kx - 2x

kx = 2x + 6x

kx = 8x

k = 8x/x

k = 8

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