Answer:
[tex] \frac{3 + \sqrt{53} }{2} and \: \frac{3 - \sqrt{53} }{2} [/tex]
Step-by-step explanation:
[tex]8x-4= {x}^{2} +5x-15[/tex]
=> we try to make one side "0". I choose left side. So;
=> add -8x both side. Because left side has +8x
[tex]8x-4 - 8x= {x}^{2} +5x-15 - 8x[/tex]
[tex]-4= {x}^{2} - 3x -15[/tex]
=> add +4 both side. Because left side has -4
[tex]-4 + 4= {x}^{2} - 3x -15 + 4[/tex]
[tex]0= {x}^{2} - 3x -11[/tex]
[tex]{x}^{2} - 3x -11 = 0[/tex]
Use quadratic formula :
- What is quadratic formula
- solving for x
I solved in the picture, you can look it :)
Hope this helps ^-^
