NEED HELP! 15 POINTS!

10. What is the factored form of the expression x² + 3x-10 ?

A: (x+5)(x-2)
B: (x-5)(x-2)
C: x-5)(x+2)
D: (x+5)(x+2)

Course: Algebra I

If you can please give me a detailed explanation as to why the answer is the answer so I can do the problems myself but you don't have to!

Thanks!​