25(a+b)的平方-9(a-b)的平方 因式分解

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25(a+b)^2-9(a-b)^2
=[5(a+b)+3(a-b)][5(a+b)-3(a-b)]
=(8a+2b)(2a+8b)
=4(4a+b)(a+4b)

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25(a+b)的平方慎瞎迅-9(a-b)的平宽此方神唤
=(5a+5b-3a+3b)(5a+5b+3a-3b)
=(2a+8b)(8a+2b)
=4(a+4b)(4a+b)

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25(a+b)^2-9(a-b)^2
=(5a+5b+3a-3b)(5a+5a-3a+3b)
=4(4a+b)(a+4b)

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