PLEASEEEEE HELLLLLLP!!!!!!!!!!!
1)factor the expression.
x^2+7x+10
a) (x+3)(x+4)
b) (x+2)(x+5)
c) (x-2)(x-5)
d) (x+1)(x+7)

2)factor the expression
x^2-3x+2
a) (x+2)(x-1)
b) (x+2)(x+1)
c) (x-2)(x-1)
d) (x-1)(x-3)

3)factor the expression
-x^2+3x+40
a) -(x+2)(x-20)
b) -(x-5)(x+8)
c) (x-4)(x-10)
d) -(x+5)(x-8)

4) find the GCF of the expression
3a^2+9
a)3
b)a
c)a+3
d)3a

5)find the GCF of the expression
25b^2-20b
a)25
b)5-b
c)b
d)5b