(2a^2 + 5a + 7) - (a^2 - 3a -1) =

Answer 1

2a^2 + 5a + 7 - a^2 + 3a + 1

Simplifying,

2a^2 - a^2 + 5a + 3a + 7 + 1

a^2 + 8a + 8