Demostrar que los puntos (-2,-1), (2,2) y (5,2) son vértices de un triángulo isoceles Ayúdenme )':

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-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

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