jordynsmithh
jordynsmithh
15-05-2016
Mathematics
contestada
s squared - 16s - 57
Respuesta :
Petroniusz
Petroniusz
15-05-2016
s² - 16s - 57 = s² - 16s + 64 - 121 = s² - 2*1*8 + 8² - (11)² =
we use the formula a
² - 2ab + b² = (a-b)²
(s - 8)² - (11)²
we use the formula a
² - b² = (a+b)*(a-b)
(s - 8 )² - (11)²
a² - b²
[ (S - 8) - 11] * [ (S-8) + 11] =
[S-19] * [S+3]
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