Answer:
6x² + 9x - 156 units squared
Step-by-step explanation:
Firstly, recall the formula for area of a rectangle.
A = lw, where l is the length (height) and w is the width.
This triangle has height/length 3 and width 2x² + 3x - 52.
Let's multiply these two numbers:
3(2x² + 3x - 52)
Use the distributive property and multiply each term in the parentheses by three:
6x² + 9x - 156
This is the area of the triangle!
