hannak10124 hannak10124

13-04-2021
Mathematics

contestada

Find KL.
K
X-1
L
12
M

Find KL K X1 L 12 M class=

Respuesta :

thebecks thebecks

13-04-2021

Answer:

KL = 9

Step-by-step explanation:

(7 + x - 1)(x - 1) = 12²

(x + 6)(x - 1) = 144

x² -x + 6x - 6 = 144

reduce:

x² + 5x -150 = 0

(x + 15)(x - 10) = 0

x = -15, x = 10

KL = 10 - 1 = 9

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