(2a+b)^2-(3a-b)^2+5a(a-b)

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 09:51:25
(2a+b)^2-(3a-b)^2+5a(a-b)
x)0JNҌ30N1M5@,"}<v6tSM AQik5ILN)!D5Ixt4k5&-E b$Ad@|k>%}`6["T>۽YK9_?ߵ/^E 8'

(2a+b)^2-(3a-b)^2+5a(a-b)
(2a+b)^2-(3a-b)^2+5a(a-b)

(2a+b)^2-(3a-b)^2+5a(a-b)
(2a+b)²-(3a-b)²+5a(a-b)
=4a²+4ab+b²-(9a²-6ab+b²)+5a²-5ab
=4a²+4ab+b²-9a²+6ab-b²+5a²-5ab
=5ab

(2a+b)2-(3a-b)2+5a(a-b)
=4a^2+4ab+b^2-9a^2+6ab-b^2+5a^2-5ab
=5ab
=1/10

原式=4a²+4ab+b²-9a²+6ab-b²+5a²-5ab
=4ab+6ab-5ab
=5ab
满意望采纳

(2a+b)^2-(3a-b)^2+5a(a-b)=4a^2+4ab+b^2-9a^2+6ab-b^2+5a^2-5ab=ab