0.0625a^4-b^4 -1+s^4
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![0.0625a^4-b^4 -1+s^4](/uploads/image/z/5090448-48-8.jpg?t=0.0625a%5E4%EF%BC%8Db%5E4+%EF%BC%8D1%2Bs%5E4)
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0.0625a^4-b^4 -1+s^4
0.0625a^4-b^4
-1+s^4
0.0625a^4-b^4 -1+s^4
0.0625a^4-b^4
=(0.25a)^4-b^4
=[(0.25a)^2+b^2][(0.25a)^2-b^2]
=[(0.25a)^2+b^2](0.25+b)(0.25-b)
-1+s^4
=s^4-1
=(s^2+1)(s^2-1)
=(s^2+1)(s+1)(s-1)
0.0625a^4-b^4
=(0.25a^2+b^2)(0.25a^2-b^2)
=(0.25a^2+b^2)(0.5a-b)(0.5a+b)
-1+s^4=-(1-s^2)(1+s^2)=-(1-s)(1+s)(1+s^2)
0.0625a^4-b^4 -1+s^4
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