计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/27 09:48:13
计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)计算:[(3a-2b)^2-(3a+2b)(3a-2

计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)

计算:[(3a-2b)^2-(3a+2b)(3a-2b)]÷(2b-3a)
原式=(3a-2b)[(3a-2b)-(3a+2b)]÷(2b-3a)
=-4b(3a-2b)÷(2b-3a)=4b

=(9a^2-12ab+4b^2-9a^2+4b^2)/(2b-3a)
=(-12ab+4b^2)/(2b-3a)
=4b(-3a+2b)/(2b-3a)
=4b

提公因式啊
(3a-2b)(3a-2b-3a-2b)/(2b-3a)
4b(2b-3a)/(2b-3a)=4b

4b