Care este forma standard a y = (x + 3) ^ 3?

Care este forma standard a y = (x + 3) ^ 3?
Anonim

Răspuns:

# X ^ 3 + 9x ^ 2 + 27x + 27 #

Explicaţie:

# "Dat" (x + a) (x + b) (x + c) "expansiunea este" #

# = X ^ 3 + (a + b + c) x ^ 2 + (ab + bc + ac) x + abc #

# "acum" (x + 3) ^ 3 = (x + 3) (x + 3) (x + 3)

# "cu" a = b = c = 3 #

#rArr (x + 3) ^ 3 #

# = X ^ 3 + (3 + 3 + 3) x ^ 2 + (9 + 9 + 9) x + (3xx3xx3xx3) #

# = X ^ 3 + 9x ^ 2 + 27x + 27 #

Răspuns:

#color (albastru) (y = x ^ 3 + 9x ^ 2 + 27x + 27) #

Explicaţie:

# Y = (x + 3) ^ 3 #

#color (alb) (……….) x + 3 #

#color (alb) (……) xx x + 3 #

#color (alb) (…………) overline (x ^ 2 + 3x) #

#color (alb) (…………..) + 3x + 9 #

#color (alb) (………..) overline (x ^ 2 + 6x + 9) #

#color (alb) (…….) xx x + 3 #

#color (alb) (………….) overline (x ^ 3 + 6x ^ 2 + 9x) #

#color (alb) (………………….) 3x ^ 2 + 18x + 27 #

#color (alb) (………….) overline (culoare (albastru) (x ^ 3 + 9x ^ 2 + 27x + 27) #