SOLUTION: Factor the following trinomial: -5x^2+2x+16

Question 851954: Factor the following trinomial:
-5x^2+2x+16

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Try factoring negative 1 and then make trials to test multiply.
and just focus on the quadratic factor, and try to factor it.

This should mean that 5b+a=-2 and ab=-16 but this does not make the process any easier.

Try different combinations.
-
(5x__2)(x__8)---------- 2 and 40; and 16
-
(5x__8)(x__2)--------- 10 and 8; and 16. Maybe.
-
(5x__4)(x__4)--------- 20 and 4; and 16
-
-
The combination that works including which operations in each binomial factor is
, and since you started with a factor of negative 1, your factorization can be:
.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

Factor the following trinomial:
-5x^2+2x+16

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