Question

expand expand ( 2 X + 3 y)

square?​

Answer 1

Answer:

(2x + 3y)²

(2x)² + 2 * 2x * 3y + (3y)²

4x² + 12xy + 9y²

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Identity Used:

• (a + b)² = a² + 2ab + b²

Answer 2

Solution:-

=) ( 2x + 3y)²

=) (2x)² + (3y)² + 2(2x)(3y)

=) 4x² + 9y² + 12xy

Identify Used:-

( a+b)² = a² + b² + 2ab

Other Identities:-

( a-b)² = a² + b² - 2ab

( a² - b²) = ( a+b)(a-b)

(a-b)³ = a³ - b³ - 3ab ( a-b)

(a+b)³ = a³ + b³ + 3ab ( a+b)

( a-b-c)² = a² + b² + c² - 2ab + 2bc - 2ac

( a³ - b³) = ( a- b)³ + 3ab( a-b)

( a³ + b³) = ( a+b)³ - 3ab(a+b)