tyre2k17 tyre2k17

04-08-2017
Mathematics

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PLEASE HELP!!!! 3. A manufacturer of shipping boxes has a box shaped like a cube. The side length is
(5a + 4b). What is the volume of the box in terms of a and b? Show your work.

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kphung76127 kphung76127

04-08-2017

(5a+4b)(5a+4b)
25a^2+20ab+20ab+16b^2
(25a^2+40ab+16b^2)(5a+4b)
125a^3+200a^2b+80ab^2+100a^2b+160ab^2+64b^3
Simplify like terms
125a^3+300a^2b+240ab^2+64b^3

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