factorise
(a+b)^2 +8 (a+b)(a-b) +15 (a-b)^2
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Answer:
(a - b)^2 + 8(a - b) + 15 = (a - b)^2 + 5(a - b) + 3(a - b) + 15 = (a - b)(a - b + 5) + 3(a - b + 5) = (a - b + 5)(a - b + 3) More
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