my answer -
1. Simply subtract 3x - 7 from x² + 4x - 1.
x² + 4x - 1 - (3x - 7)
==> x² + 4x - 1 - 3x + 7
==> x² + x + 6
2. This problem is similar to the first.
a² + a - 6 - (a³ - 2a)
==> a² - a³ + a + 2a - 6
==> -a³ + a² + 3a - 6
I hope this helps!
P.S
Have an AWESOME!!!!! day happy to help you.