-7x^2-23x+10=0
–7x2 – 23x + 10 = 0
7x2 + 23x – 10 = 0
–23 + sqrt(232 – (4 • 7 • –10))
x = ––––––––––––––––––––––––
2 • 7
–23 + sqrt(809)
x = –––––––––––––
14
–23 + 28.44293
x = +0.38878
x = –3.67449
.