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25a²-4b²-28bc-49c². Factorise the equation step by step. |
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Answer» Answer: 25 a² -( (2b)²+ (7C)² -2* 7*2*B*c) (5A)²- (2b - 7c)² (5a + 2b-7c)( 5a - 2b+7 c) |
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