Factor the Expression Completely $9 z ^ { 2 } + 42 z + 49$

question 14

Multiple Choice

Factor the expression completely. $9 z ^ { 2 } + 42 z + 49$

• A) \(\quad ( 3 z - 7 ) ^ { 2 }\)
• B) \(\quad ( 3 z + 7 ) ( 3 z - 7 )\)
• C) \(\quad 7 ( 3 z + 7 )\)
• D) \(\quad ( 3 z + 7 ) ^ { 2 }\)

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