S squared - 16s - 57

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asked May 3, 2017 199k views

1 Answer

Ilevent · Answer 1 · 2017-05-09T09:24:44+0000

s² - 16s - 57 = s² - 16s + 64 - 121 = s² - 2*1*8 + 8² - (11)² =
we use the formula a² - 2ab + b² = (a-b)²
(s - 8)² - (11)²
we use the formula a² - b² = (a+b)*(a-b)
(s - 8 )² - (11)²
a² - b²

[ (S - 8) - 11] * [ (S-8) + 11] = [S-19] * [S+3]

S squared - 16s - 57

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