how many solutions are there to the equation -0.2x^+12x+11=0

Answer 1

are you still working on that problem?
http://www.jiskha.com/display.cgi?id=1239629281

since the parabola opens downwards and the vertex is above the x-axis there will be 2 real solutions for the equation.

Hint: Divide each term by -.2 to get
x^2 - 60x - 55 = 0

x^2 - 60x + ____ = 55
x^2 - 60x + 900 = 55 + 900
(x-30)^2 = 955
x = 30 ± √955