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Svet_ta [14]
3 years ago
6

Help me please please ​

Mathematics
1 answer:
frosja888 [35]3 years ago
4 0

Answer:

3a^2 - 7a - 6

Step-by-step explanation:

Find the average length of the light gray shaded figure.  It is:

4a + 5 + 2a - 1        6a + 4

--------------------- = --------------- = 3a + 2

            2                      2

Now multiply this average length, 3a + 2, by the width, a - 3:

Area of light gray figure is (3a + 2)(a - 3) = 3a^2 - 7a - 6

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