Factor Completely Using the Grouping Method to Factor Trinomials $14 x ^ { 2 } - 49 x - 28$

question 71

Multiple Choice

Factor completely using the grouping method to factor trinomials. If unfactorable, indicate that the polynomial is prime.
- $14 x ^ { 2 } - 49 x - 28$

• A) \(7 ( 2 x + 1 ) ( x - 4 )\)
• B) prime
• C) \(( 14 x - 7 ) ( x + 4 )\)
• D) \(7 ( 2 x - 1 ) ( x + 4 )\)

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