Question

factorise 4 x square + 9 y square -1 2 x square​

Answer 1

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

=>(2x)^2 +(3y)^2 + 2× 2x ×3y

=>( 2x+3y)^2.

=> (2x+3y)(2x+3y)

Answer 2

4x² + 9y² - 12xy

(a + b)² = a² - 2ab + b²

= (2x)² - 2(2x)(3y) (3y)²

= (2x- 3y)²

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