Question

9x^2 -4y^2 factorise​

Answer 1

$Given \: 9x^{2} - 4y^{2}$

$= (3x)^{2} - (2y)^{2}$

/* By algebraic identity */

$\boxed{ \pink{ a^{2} - b^{2} = ( a + b )( a - b )}}$

$= (3x + 2y )( 3x - 2y )$

Therefore.,

$\red{ Factors \: of \:9x^{2} - 4y^{2}}$

$\green {= (3x + 2y )( 3x - 2y )}$

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Answer 2

hope you have understood