4x2 + 12xy +9y2 – z^2
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Answer:
(2x+3y-z)(2x+3y+z)
Step-by-step explanation:
(2x)²+2(2x)(3y)+(3y)²-z²
(2x+3y)²-z²
(2x+3y-z)(2x+3y+z)
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