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VIDEO ANSWER: Hey so we need to expand the powers and we have x plus x to the power 5 which is equal to 1 plus 5x plus 5 into 4 upon 2 x x squared plus 5 into 4 into 3 x cube plus 5 into 4 into 3 2 upon 4 x power 4
(1+x)^7 | Numerade