Question

yaar koi to ans de do na is dono questions ka ​

Answer 1

Answer:

1) (a^2-b^2)

2) x^3 - 6x^2 + 12 x - 8

All the best

Answer 2

Solution:-

Question:- 1

=> Given equation (2x + y )(2x - y )

=> We can use this :- ( a - b )(a + b ) = a² - b²

=> Now simplify the equation

=> ( 2x + y )(2x - y )

=> ( 2x)² - ( y )²

=> 4x² - y²

Answer:- Option 2 is correct

Question:- 2

=> Given equation ( x - 2 )³

=> We can use this identity :-

( a - b )³ = a³ - b³ - 3ab( a - b ) = a³ - b³ -3a²b + 3ab²

=> Now Simplify the equation

=>( x - 2)³

= x³ - 2³ - 3 × x² × 2 + 3 × x × 2²

=> x³ -8 - 6x² + 12x

=> x³ - 6x² + 12x - 8

Answer:- Option 2 is correct

More identities

=> ( a - b )² = a² + b² - 2ab

=>( a + b )² = a² + b² + 2ab

=> ( a - b )(a + b ) = a² - b²

=>( a - b )³ = a³ - b³ - 3ab( a - b )

=>( a + b )³ = a³ + b³ + 3ab( a + b )