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Add or Subtract 5x2+780x2380x2\sqrt { 5 x ^ { 2 } } + 7 \sqrt { 80 x ^ { 2 } } - 3 \sqrt { 80 x ^ { 2 } }

Question 232

Multiple Choice

Add or subtract. Assume all variables represent positive real numbers.
- 5x2+780x2380x2\sqrt { 5 x ^ { 2 } } + 7 \sqrt { 80 x ^ { 2 } } - 3 \sqrt { 80 x ^ { 2 } }


A) 17x10217 x \sqrt { 102 }
B) 4×54 \times \sqrt { 5 }
C) 4x1024 x \sqrt { 102 }
D) 17x517 x \sqrt { 5 }

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