Quadratic Equations. Quadratic Equations don't always look like such. To obtain one you may have to carry out some sort of substitution or manipulate expressions suitably.
The equation $$2x - 5 \sqrt{x} +2 = 0$$ has two real solutions. The smaller is , and the larger is .
The equation $$2x^4 - 5 x^2 +2 = 0$$ has two positive real solutions. The smaller is , and the larger is .
The equation $$\frac{1}{x-1}-\frac{x}{x+1}-2 = 0$$ has two real solutions. The smaller is , and the larger is .