- #1
mathlearn
- 331
- 0
Data
The solution of the quadratic equation $5x^2-5x-11=0$ is $x=\frac{5-7\sqrt{5}}{10}$
PB=$2x-1$ cm
Where do I need help
By substituting the solution $x=\frac{5-7\sqrt{5}}{10}$ in the expression above for the length of $PB$ , show that this solution is not suitable.
Many Thanks :)
The solution of the quadratic equation $5x^2-5x-11=0$ is $x=\frac{5-7\sqrt{5}}{10}$
PB=$2x-1$ cm
Where do I need help
By substituting the solution $x=\frac{5-7\sqrt{5}}{10}$ in the expression above for the length of $PB$ , show that this solution is not suitable.
Many Thanks :)