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Solve the Problem P=(6,9)\mathrm { P } = ( - 6 , - 9 )

Question 93

Multiple Choice

Solve the problem.
-If P=(6,9) \mathrm { P } = ( - 6 , - 9 ) and Q=(x,105) \mathrm { Q } = ( \mathrm { x } , - 105 ) , find all numbers x\mathrm { x } such that the vector represented by PQ\overrightarrow { \mathrm { PQ } } has length 120- 120 .


A) {66,78}\{ 66 , - 78 \}
B) {78,78}\{ 78 , - 78 \}
C) {66,84}\{ 66 , - 84 \}
D) {78,66}\{ 78,66 \}

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