跪求大家帮我解决两道道初一数学平方差公式计算,谢谢
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发布时间:2024-10-01 14:42
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热心网友
时间:2024-12-13 17:33
1. =(9a^2-4b^2)(9a^2+4b^2)
=81a^4-16b^4
2. =(4x^2-1)(4x^2+1)(16x^4+1)
=256x^8-1
热心网友
时间:2024-12-13 17:33
(3a+2b)(3a-2b)(9a^2+4b^2)
=(9a^2-4b^2)(9a^2+4b^2)
=81a^4-16b^4
(2x+1)(4x^2+1)(2x-1)(16x^4+1)
=(2x+1)(2x-1)(4x^2+1)(16x^4+1)
=(4x^2-1)(4x^2+1)(16x^4+1)
=(16x^4-1)(16x^4+1)
=256x^8-1
热心网友
时间:2024-12-13 17:34
(3a+2b)(3a-2b)(9a^2+4b^2)=(9a^2-4b^2)(9a^2+4b^2)=81a^4-16b^4
(2x+1)(4x^2+1)(2x-1)(16x^4+1)=(4x^2-1)(4x^2+1)(16x^4+1)=(16x^4-1)(16x^4+1)=256x^8-1