simplify using identities :99 square
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Step-by-step explanation:
, the question is (99)²,
...
Answer :
(a + b)² = a² + b² + 2ab.
(a - b)² = a² + b² - 2ab.
(a² - b²) = (a + b) (a - b)
(x + a) (x +b) = x² + (a + b)x + ab.
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