identify whether each of the following expression is a quadratic expression in one variable. Give reason for your anwser a. [tex] {x}^{2} + 5x - 10[/tex] b. [tex] - 4 {u}^{2} - 3u[/tex] c. [tex]5x + 8[/tex] d. [tex] {x}^{3} + 2x + 1[/tex] e. [tex] \frac{2}{9} {y}^{2} [/tex] f. [tex] \frac{ {x}^{2} + 7x + 2}{x} [/tex]
i believe anything that is squared (^2) is a quadratic. so a, b, e and f are quadratics. you could also check on desmos to see if they are parabolas (u shape).
