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Q: In which situation would you factor out -1 from a trinomial?

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(x + 1)(x - 4)

(3x+1)(x+2)

Suppose the trinomial is x2 + Bx + C You need to find a factor pair of C whose sum is B. If the factors are p and q (that is, pq = C and p+q = B), then the trinomial can be factorised as (x + p)*(x + q).

Common Apex

Do in this order. 1. All, find the gfc 2. Binomial, factor as difference of squares, sum of cubes, difference of cubes. 3. Trinomial, factor as a quadratic. 4. 4 or more terms, factor by grouping.

Related questions

A factor of a perfect square trinomial is eithera number that is a factor of each term of the trinomial,a binomial that is a factor of the trinomial, ora product of the above two.For example, consider 4x2 + 8x + 4It has the factors2 or 4,(x + 1) or2x+2 = 2*(x+1) or 4x+4 = 4*(x+1)

If the coefficient of the highest power of a variable of interest is negative.

Take a trinomial. 2x2 - 3x - 2 Factor it. (2x + 1)(x - 2) Repeat as necessary.

1, 5 and 6 x^2 + 5x + 6 = (x + 2)(x + 3)

just make the trinomial easier to factor. ex -x2 + 3x + 4 ... most books don't teach you how to factor when a leading term is negative. ... so -1(x2- 3x- 4) ... now factor again ignoring the -1 -1(x - 4)(x + 1)

(x + 1)(x - 4)

(3x - y)(3x - 5y) and (2x + 1)(2x + 11)

(x - 1)(x - 14)

(5x - 1)(x + 3)

(x - 4)(x - 1).

(3x + 2)(x - 1)

2(4x - 1)(5x - 6)

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