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Question 2 Multiple Choice Worth 4 points)

(02.04)
Which of the following is one of the factors of 3x2 - 14x + 8?
(3x + 4)
(3x - 2)
(x+2)
(x + 4)

1 Answer

4 votes

Answer:

(3x - 2 )

Explanation:

Given

3x² - 14x + 8

Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term

product = 3 × 8 = 24 and sum = - 14

Factors are - 12 and - 2

Use these factors to split the x- term

3x² - 12x - 2x + 8 ( factor the first/second and third/fourth terms )

= 3x(x - 4) - 2(x - 4) ← factor out (x - 4) from each term

= (x - 4)(3x - 2) ← in factored form

The factors are (x - 4) and (3x - 2)

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