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1. Factorise : (1) y' - 27hey guys anwer it plz |
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Answer» -STEP explanation:1−27a 3 =1 3 −(3A) 3 , Using the formula, a 3 −b 3 =(a−b)(a 2 +ab+b 2 )=(1−3a)[1 2 +1×3a+(3a) 2 ]=(1−3a)(1+3a+9a 2 ) |
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