Algebra
posted by Ami .
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, 5f2f=+3f
c) +5*(+2)=+10
d) 5*(+2)=10, 5f+2f=3f
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