Question

factories :- 4y^2-12x+9x^2-4z^2​

Answer 1

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Q. 4y² -12x +9x²-4z²

= 4y² - 9x² -12x -4z²

=(2y) ² - (9x) ² - 12x -(2z) ²

= (2y + 9x) (2y -9x) - 12x (2z) ²

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