①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)(_______) (填空题)

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①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)(_______)(填空题)①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)

①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)(_______) (填空题)
①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)(_______) (填空题)

①4a^2-9(a-b)^2=[2a+____][2a-____]=(_______)(_______) (填空题)
4a^2-9(a-b)^2=[2a+3(a-b)][2a-3(a-b)]=(5a-3b)(-a+3b)
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①4a^2-9(a-b)^2=[2a+3(a-b)][2a-3(a-b)]=(5a-3b)(3b-a) (填空题)

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