Question

Which value of b would make x2 + bx - 24 factorable?
a. 4
b. 5
C. 8
d. 12

Answer 1

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Answer:

b. 5

Explanation:

For the trinomial to be factorable using integers, the value of b will be the difference of two factors of 24.

24 = 1×24 = 2×12 = 3×8 = 4×6

Differences of these factors are 23, 10, 5, 2. Of these, only 5 is listed as a choice.

b = 5 will make the expression factorable.