Youngjae
Youngjae
20-08-2015
Mathematics
contestada
25x^2-16y^2 how to factor?
Respuesta :
222916
222916
20-08-2015
25x^2-16y^2=(5x)^2-(4y)^2=(5x-4y)(5x+4y)
a^2-b^2=(a-b)(a+b)
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