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The factorisation of m2-81 |
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Answer» ong>Step-by-step explanation: Rewrite 81 as 92 . SINCE both TERMS are perfect SQUARES, factor using the difference of squares FORMULA, a2−b2=(a+b)(a−b) a 2 - b 2 = ( a + b ) ( a - b ) where a=m and b=9 . |
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