(a+2)^2 - 2(a+3)^2
Factorise it
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Step-by-step explanation:
(a+2)² - 2(a+3)²
= a² + 4 + 2×a×4 - 2(a² + 9 +2×a×3)
= a² + 4 + 8a - 2a² -18 - 12a
= -a² - 14 - 4a
= -(a²+4a+14)
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