@ (x+2y) ² - 4 (2X-y)²
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Answer:
20xy - 15x^2
Step-by-step explanation:
= x^2 + 4xy + 4y ^2 - 4( 4x^2 - 4xy+ y^2 )
= x^2 + 4xy + 4y^2 - 16x^2 + 16xy - 4y^2
= -15x^2 +20xy
= 20xy - 15x^2
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