Finding zeros

Front

What is another way to say "where a function crosses the x-axis"?

Back

x-intercept, zero, root, all of these.

Front

What is a zero of a function?

Back

A value of x that makes the function equal to zero.

Front

What does it mean if a function has no real zeros?

Back

It means the function does not cross the x-axis.

Front

How can you find the zeros of a polynomial function?

Back

By factoring, using the quadratic formula, or graphing.

Front

What is the x-intercept of the function f(x) = x^2 - 4?

Back

x = 2 and x = -2.

Front

What is the degree of the polynomial P(x) = 3x^4 + 4x - 8?

Back

4.

Front

How many zeros does the polynomial function P(x) = x^3 + 2x^2 + 9x + 18 have?

Back

1.

Front

What is the significance of the x-intercept in a graph?

Back

It shows where the function equals zero.

Front

What is a polynomial function?

Back

A function that is represented by a polynomial expression.

Front

What does it mean for a zero to be 'real'?

Back

It means the zero is a real number, not imaginary.