How do simplify (7.5a - 2.5b) squared - (2.5a - 7.5b) squared?
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Answer:
50a^2 - 50b^2
Step-by-step explanation:
(7.5a-2.5b)^2 = (7.5a-2.5b)(7.5a-2.5b)
(2.5a-7.5b)^2 = (2.5a-7.5b)(2.5a-7.5b)
so......
(7.5a-2.5b)(7.5a-2.5b) - (2.5a-7.5b)(2.5a-7.5b) =
50a^2 - 50b^2
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