(a+b)^3-8(a-b)^3 factorise pls answer it is urgent
Answers
Answered by
1
Step-by-step explanation:
3a³+3b³+9ab-8a³+8b³-8ab
-5a³+11b³+ab
5a³-11b³+ab=0
Answered by
1
Answer:
equation at the end of step 1 :
((a + b)3) - 8 • (a - b)3
Step 2 :
2.1 Evaluate : (a+b)3 = a3+3a2b+3ab2+b3
2.2 Evaluate : (a-b)3 = a3-3a2b+3ab2-b3
Checking for a perfect cube :
2.3 -7a3+27a2b-21ab2+9b3 is not a perfect cube
Final result :
-7a3 + 27a2b - 21ab2 + 9b3
hope it helps you buddy!!
:)
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