Question

Ayuda! Por favor.
En cada uno de los pasos escribe la propiedad que se emplea:

a) (a + b) + (c + d) = [ (a + b) + c] + d__________________________
= c + a + b+ d __________________________
= [(c + a) + b] + d__________________________
= (c + a) + (b + d)_________________________
b) 4[(x + y) + z] = 4[z + (x + y)]__________________________
= 4z + 4(x + y)__________________________
= 4z + 4x + 4y__________________________
= 4z + (4x + 4y)__________________________
= (4x + 4y) + 4z__________________________

Answer 1

Respuesta:

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