Factorise 4x^2+9y^2-z^2+12xy
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Step-by-step explanation:
4x² + 9y² - z² + 12xy
= (2x)² + 12xy + (3y)² - z²
= (2x + 3y)² - z² [ a² + 2ab + b² = (a+b)² ]
= (2x + 3y + z ) (2x + 3y - z) ...Ans
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