djkk1367
31.03.2021 •
Mathematics
Select all expressions that are squares of linear expressions.
Ox? + 7x + 49
✓
(x+3)
d? - 40 + 4
(y + 2) (y - 2)
O x2 + 64
9z2 – 36
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Ответ:
correct answer is 2800.
Step-by-step explanation:
You take the area of the square which is 20x20 = 400.
There is 5 squares 400x5 = 2000
There is 4 triangles--which is 1/2 the area of 1 square (In this case).
One triangle = 200
200x4 = 800
2000 + 800 = 2800