# How do you factor the expression #91-90t-16t^2#?

##### 1 Answer

Dec 2, 2015

#### Answer:

Factor y = -16t^2 - 90t + 91

Ans:

#### Explanation:

I use the new AC Method to factor trinomials (Socratic Search).

Converted trinomial

p' and q' have opposite signs.

Factor pairs of (-1456) --> ...(-8, 182)(-14, 104). This sum is (- 14 + 104) = 90 = b. Then, p' = -14 and q' = 104.

Therefor,

Factored form:

NOTE. This method is systematic. There are no guessing and no lengthy factoring by grouping.