What are the factor of the following trinomial?
f^2 + 3f - 10
a)(f - 5)(f - 2)
b)(f + 5)(f - 2)
c)(f + 5)(f + 2)
d)(f - 5)(f + 2)
Do a mental calculation as follows and make you choice accordingly:
a) -5*(-2)=+10
b) -5*(-2)=-10, 5f-2f=+3f
c) +5*(+2)=+10
d) -5*(+2)=-10, -5f+2f=-3f