kyra04
kyra04
25-05-2017
Mathematics
contestada
What is the product of (9t-4)(-9t-4)
Respuesta :
3mar
3mar
25-05-2017
(9t-4)(-9t-4)
using the FOIL :
9t * -9t = -81 t^2
9t * -4 = -36 t
-4 * -9t = 36 t
-4 * -4 = 16
-----------------------add up and simplify
[tex]-81 t^2 -36 t + 36 t +16 = -81 t^2 +16[/tex]
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