factorise 1-25(2a-5b) ²
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Step-by-step explanation:
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Answer:
(1 + 10a - 25b)(1 - 10a + 25b)
Step-by-step explanation:
=1 raise to the power 2 - [5(2a - 5b)]2
=1 raise to the power 2 -(10a - 25b)2
=[1 + (10a - 25b)] [1 - (10a - 25b)]
= (1 + 10a - 25b)(1 - 10a + 25b)
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