What kind of solutions does #2x^2 + x - 1 = 0# have?
2 real solutions
You can use the discriminant to find how many and what kind of solutions this quadratic equation has.
Quadratic equation form:
Plug 2, 1, and -1 in for a, b, and c (and evaluate):
Negative discriminants indicate that the quadratic function has 2 imaginary (involving
Discriminants of 0 indicate that the quadratic function has 1 real solution. The quadratic function can be factored into the perfect square of something (such as