Seudónimo
Seudónimo
13-01-2016
Mathematics
contestada
Factorise fully 9x^2 - 16y^2
Respuesta :
TSO
TSO
13-01-2016
Note: a² - b² = (a-b)(a+b)
9x² - 16y² = (3x)² - (4y)² =
(3x - 4y)(3x + 4y)
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