How to find zeros of a function khan academy?

Notice that when you take the square root of a negative number, it gives you either a positive number or the value of zero. If you are given an equation where one of the variables is a square root of a negative number and you are asked to find the zeros of the function, you can use the four step method to find the roots or use the quadratic equation.

How to find max and mins of a

Sometimes when you graph a function, you discover that it has a single maximum or minimum. Or, it might have more than one maximum or minimum. To find the maximum and minimum values of a function, use the first derivative. If the first derivative is always positive, then the function has a single maximum at the point where the first derivative is 0. If the first derivative is always negative, then the function has a single minimum at the point where the first derivative is 0. If the first derivative

How to find the roots of a quadratic function khan academy?

Find the zeros of a quadratic function by setting the function equal to zero and solving for each variable. You can use the two roots of a quadratic equation calculator to get the two roots of a quadratic function. If you have more than two roots, check whether one of them is an inflection point. An inflection point is a point where the concavity of the curve changes.

How to find the roots of a cubic function khan academy?

Cubic functions have three solutions. We can use the zero sum method to find all three roots. This method works for any cubic function. First, find the coefficient of the highest power term in the function. That will be your starting value. Then, subtract three from each term in the function and add the value of the cube of the initial value to each term. This will be the new sum. Now, test each of the original terms to see which values make the sum equal to zero.

How to find critical points of a function khan academy?

A critical point is a point at which the function changes its behavior. For example, if you have a function f of two variables x and y, then the critical point of this function is the point at which the gradient of the function is zero. Or, in other words, it is the point at which the rate of change of the function with respect to both variables is zero. This is because if you have a function f whose gradient is zero at a particular point, it implies that the function