To simplify this expression, we will distribute the negative sign to both terms inside the parentheses:
(7a^2 - 3a) - (5a^2 - 8a)= 7a^2 - 3a - 5a^2 + 8a= (7a^2 - 5a^2) + (-3a + 8a)= 2a^2 + 5a
Therefore, the simplified expression is 2a^2 + 5a.
To simplify this expression, we will distribute the negative sign to both terms inside the parentheses:
(7a^2 - 3a) - (5a^2 - 8a)
= 7a^2 - 3a - 5a^2 + 8a
= (7a^2 - 5a^2) + (-3a + 8a)
= 2a^2 + 5a
Therefore, the simplified expression is 2a^2 + 5a.