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Factorise: x^6-7x^3-8

Asked by laxmi.agarwal055 21st February 2018, 8:46 PM
Answered by Expert
Answer:
begin mathsize 16px style straight x to the power of 6 minus 7 straight x cubed minus 8
Put space straight x cubed equals straight t
straight t squared minus 7 straight t minus 8
left parenthesis straight t minus 8 right parenthesis left parenthesis straight t plus 1 right parenthesis
straight t equals straight x cubed
left parenthesis straight x cubed minus 8 right parenthesis left parenthesis straight x cubed plus 1 right parenthesis
open parentheses straight x minus 2 close parentheses left parenthesis straight x squared plus 2 straight x plus 4 right parenthesis left parenthesis straight x plus 1 right parenthesis left parenthesis straight x squared minus straight x plus 1 right parenthesis end style
Answered by Expert 22nd February 2018, 10:44 AM
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