Answer:
4x² - 35
Explanation:
Split the polygon into two rectangles and find the areas of the two rectangles, then add them together.
x(3x - 2) + (x - 5)(x + 7)
Expand the brackets.
3x² - 2x + x(x+7) - 5(x+7)
3x² - 2x + x² + 7x - 5x - 35
Add or subtract like terms.
4x² - 35