Question

Expand(3x+2y)^2
by using identity.​

Answer 1

Answer:

This is in the form of (a + b) ^2

whose formula is a^2 +b^2 +2ab

here a = 3x and b= 2y

so answer = 3x^2 + 2y^2 + 2×3x×2y

= 9x^2 + 4y^2 + 12xy

Answer 2

Answer:

• 9x² + 4y² – 12xy

Step-by-step explanation:

( 3x – 2y )²

= ( 3x )² + ( 2y )² – 2 ( 3x ) ( 2y )

= 9x² + 4y² – 12xy

{ Using Identity ( a – b )² = a² – b² – 2ab }