6 Determine the Most Efficient Method to Use When Solving $\mathrm { y } _ { 1 } = 2 - 10 \mathrm { x } , \mathrm { y } _ { 2 } = ( 3 \mathrm { x } - 7 ) ( \mathrm { x } + 1 )$

6 Determine the Most Efficient Method to Use When Solving a Quadratic Equation
- $\mathrm { y } _ { 1 } = 2 - 10 \mathrm { x } , \mathrm { y } _ { 2 } = ( 3 \mathrm { x } - 7 ) ( \mathrm { x } + 1 )$ , and $\mathrm { y } _ { 1 } - \mathrm { y } _ { 2 } = 0$

A) $- 3,1$
B) $- 1 , \frac { 7 } { 3 }$
C) $- 1,3$
D) $\frac { 1 } { 5 }$