math (crying) | Tuontoes | Page 1

plucky creek Oct 9, 2022, 1:15 AM

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Pls save me from my suffering

a) (already figured this part out) Expand (X-5)^5

b) Hence, find the value of term that contains x^4 in (2X-1)(X-5)^5

THANK YOU. T-T

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Apparently the answer is 525X^4 but I have no idea how

austere creek Oct 9, 2022, 2:22 AM

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this is how I did it

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I did this by using the general term formula in binomial expansion, an fyi just in case what I did wasn’t clear sitt

plucky creek Oct 9, 2022, 6:35 AM

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You are AMAZING

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Thank you so much I can sleep in peace now

#math (crying)