1. It is a quadratic equation.
Step-by-step explanation:
A quadratic equation is any equation that can be rearranged in standard form (ax^2 + bx + c). That equation can be rewritten as -x^2 + 1, where a is -1, b is 0, and c is 1.
2. 4x^2, 3x, and 5.
Step-by-step explanation:
A quadratic term is ax^2 in the formula ax^2 + bx + c. A linear term is bx in the formula, and a constant is c in the formula.