simplify (6a+5b+4c)^2-(6a-5b-4c)^2
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Step-by-step explanation:
(6a+5b+4c)^2 - (6a-5b-4c)^2
=36a^2+25b^2+16c^2-36a^2-36a^2+25b^2+16c^2
=50b^2+32c^2
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