Question

(999)² - (998)² is equal to ______​

Answer 1

a²-b²=(a-b)(a+b)

(999-998)(999+998)

(1)(1997)

1997

Answer 2

$\sf{\huge{\underline{\pink{Answer :-}}}}$

➟ 1997

$\sf{\huge{\underline{\orange{Solution :-}}}}$

(999)² - (998)²

Using , a² - b²

{We know a² - b² = ( a + b ) ( a - b ) }

a² - b²

➝ ( a + b ) ( a - b )

➝ ( 999 + 998 ) ( 999 - 998 )

➝ 1997 × 1

➝ 1997

(999)² - (998)² is equal to _1997_ .

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