Answer: 21x^2 + 44x + 15
Step-by-step explanation:
first, i used the distributive property.
5x x (4 + 7x - 1) + 5 (4 + 7x - 1) - 2x x (4 + 7x - 1)
then, i removed the parentheses.
20x + 35x^2 - 5x + 20 + 35x - 5 - 8x - 14x^2 + 2x
then, i collected the like terms.
44x + 21x^2 + 15
finally, i reordered the terms.
21x^2 + 44x + 15
