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ample 18: Factorise(i) 49a2 + 70ab 25b(ii) 5 - yi4. |
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Answer» i) 49a² + 70ab + 25b² (7a)² + 2 × 7a × 5b + (5b)² (7a + 5b)² ii) 25x²/4 - y²/9 (5x/2)² - (y/3)² (5x/2 - y/3) ( 5x/2 + y/3) |
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