The answer is:
10x² + 24x + 8
We have to multiply 2x by both 5x and 2:
2x · 5x = 10x²
2x · 2 = 4x
Then we have to multiply 4 by both 5x and 2:
4 · 5x = 20x
4 · 2 = 8
We now have four terms:
10x² + 4x + 20x + 8
Add like terms:
4x + 20x = 24x
Final Answer:
10x² + 24x + 8