1.

(a raise to 4)- (b raise to 4) ÷ (a+b)​

Answer»

Step-by-step EXPLANATION:(a−b)4   =((a−b)2)2   =((a2+b2−2ab)2   =(a2+b2−2ab)∗(a2+b2−2ab)   =a4+a2b2−2a3b+a2b2+b4−2ab3−2a3b−2ab3+4a2b2   =a4−4a3b+6a2b2−4ab3+b4



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