veronicaheredia
veronicaheredia
22-11-2016
Mathematics
contestada
How to factor question 49
Respuesta :
knowntonoone
knowntonoone
22-11-2016
64 m^2 - 9 n^2 -------(1)
first think about squares
what is 64 m^2 = ( 8m)^2
also what is 9n^2 = (3n)^2
so 64 m^2 - 9 n^2 = (8m)^2 - (3n)^2
= (8m -3n) (8m+3n) ------(2)
to check multiply (2) to get (1)
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