Respuesta :

Menem

Answer:

Using values of x=3 and x=-21 the result of AB and AC comes same.

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Supernova11

Answer:

x = 3

Step-by-step explanation:

Using the geometric mean for altitude:

x + 9 = √18 *  8 = √144,

x + 9 = 12,

x = 3

Solution: x = 3