Answer:
see explanation
Explanation:
to calculate how many yards he mowed in 3 days, sum the 3 days, that is
Monday + Tuesday + Wednesday
= 2x² + 5x - 3 + 4x - 7 + 3x² + 10 ← collect like terms
= (2x² + 3x² ) + (5x + 4x) + (- 3 - 7 + 10)
= 5x² + 9x + 0 , that is
= 5x² + 9x ( yards )
Given he mowed 14x² + 12x - 3 yards in the entire week
Then subtract the total for the 3 days mowed from the total mowed in the entire week , that is
14x² + 12x - 3 - (5x² + 9x)
= 14x² - 12x - 3 - 5x² - 9x ← collect like terms
= (14x² - 5x² ) + (12x - 9x) - 3
= 9x² + 3x - 3 ← amount mowed during the rest of the week