(________)(3a-2)=4-9a²

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(________)(3a-2)=4-9a²(________)(3a-2)=4-9a²(________)(3a-2)=4-9a²(3a+2)(-2-3a)(3a-2)

(________)(3a-2)=4-9a²
(________)(3a-2)=4-9a²

(________)(3a-2)=4-9a²
(3a+2)

(-2-3a)(3a-2)=4-9a²

_(3a_2)

-3a-2

答案为-3a-2

应该是平方差的运用
= -3a-2