Best Answer

x - 4

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Q: What is the binomials below is a factor of this trinomial x2 plus 6x - 40?

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(x - 4) or (x + 8)

(x-4)(x-1)

X^2 - 13X + 30 = 0 (X-3)(X-10) easy inspection problem

The list of choices that you posted with your question doesn't include any factor of that expression.

(x + 1)(x + 5)

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(x + 12)(x + 7)

(x + 10)(x + 4)

(x - 4) or (x + 8)

(x-4)(x-1)

(x - 6)(x - 7)

(x + 11) and/or (x - 6)

(X + 2)(X + 4) Factored

x2+5x+6 = (x+2)(x+3)

X - 4

x2-5x+4 = (x-1)(x-4) when factord

You didn't bother to list the binomials to choose from, but the two binomial factors of x2 + 6x - 40 are (x + 10) and (x - 4)

X2 + 2X - 35(X - 5)(X + 7)================take your pick of these two binomials