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| 1. |
(a²+b²÷a²-b²) - (a-b÷2(a-b)) |
| Answer» A2 – b2 = (a – B)(a + b) * (a+b)2 = a2 + 2AB + b2 * a2 + b2 = (a – b)2 + 2ab * (a – b)2 = a2– ... a²-ab+ba-b² [Multiplication Commutative LAW]. | |