Question

Help me please please ​

Answer 1

3a^2 - 7a - 6

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