alario
alario
22-05-2017
Mathematics
contestada
alguien sabe hacer las formulas de atajo (9+3x)^2
Respuesta :
mjankiewicz
mjankiewicz
22-05-2017
Formula
[tex](a+b)^2=a^2+2ab+b^2[/tex]
a=9 , b = 3x
[tex](9+3x)^2=9^2+2*9*3x+(3x)^2=9x^2+54x+81[/tex]
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