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<img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20-13x%2B36%3D0" /> x - 9 x - 4 - 9x - 4x = - 13 (x - 9)(x - 4) = 0 x - 9 = 0 x - 4 = 0 x = 9 x = 4 CS = (4 ; 9).

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Andyandypanda
10

<img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20-13x%2B36%3D0" />

x - 9

x - 4 - 9x - 4x = - 13

(x - 9)(x - 4) = 0

x - 9 = 0 x - 4 = 0

x = 9 x = 4

CS = (4 ; 9).