alannaamarriee
06.07.2020 •
Mathematics
A rectangle backyard has length(3a+2b)m and breadth (3a-2b+c)m. 1)find the area of backyard. 2)If a=4,b=2,c=3,then find area of backyard
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Ответ:
length=(3a+2b)m
breadth=(3a-2b+c)m
Area=length*breadth
Area=(3a+2b)*(3a-2b+c)
3a(3a-2b+c)+2b(3a-2b+c)
9a2-6ab+3ac+6ab-4b2+2bc
9a2+3ac-4b2+2bc
Ответ: