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lesantik [10]
2 years ago
12

Area = ???????????????

Mathematics
1 answer:
Margaret [11]2 years ago
6 0

Answer:

x^2+10x+21

Step-by-step explanation:

Blue box: x*x=x^2

Green box: x*3=3x

Purple box: 7*x=7x

Orange box: 7*3=21

x^2+(3x+7x)+21

Combine like term

A: x^2+10x+21

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