Final answer:
In the equation y = -x² + 4, the quadratic term is -x², there is no linear term (0x), and the constant term is 4.
Step-by-step explanation:
In the quadratic equation y = -x² + 4, the quadratic term is -x², the linear term is absent, which means it would be equivalent to 0x, and the constant term is 4. A quadratic equation typically takes the form at² + bt + c = 0, where a, b, and c are constants, and a is the coefficient of the quadratic term, b is the coefficient of the linear term, and c is the constant term. The quadratic formula which is x = (-b ± √(b² - 4ac)) / (2a), is used to find the solutions of the quadratic equation when it is set to zero. Since there is no b in -x² + 4, it's effectively zero, making the linear term as 0x.
The given expression is a quadratic equation in the form at² + bt + c = 0, where the quadratic term is -x², the linear term is 0x, and the constant term is 4.