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3 years ago

7

S squared - 16s - 57

1 answer:

Romashka-Z-Leto [24]3 years ago

7 0

S² - 16s - 57 = s² - 16s + 64 - 121 = s² - 2*1*8 + 8² - (11)² =
<span>we use the formula a</span>² - 2ab + b² = (a-b)²
(s - 8)² - (11)²
<span>we use the formula a</span>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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