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## Class 9 math (India)

### Course: Class 9 math (India)>Unit 2

Lesson 2: Zeroes of a polynomial

# Polynomial factors and graphs — Basic example

Watch Sal work through a basic Polynomial factors and graphs problem.

## Video transcript

- [Instructor] The polynomial p of x has four distinct zeros, four distinct zeros. Which of the following graphs could represent y is equal to p of x. Well, four distinct zeros means that the graph is going to intersect the x-axis exactly four times. So this first one intersects the x-axis one, two, three times. So we can rule that one out. This one intersects the x-axis one, two, three, four, five times. Let's go and rule that one out. This one intersects the x-axis one, two, three, four times. It has four distinct zeros. So this looks like, this one right over here looks like our choice, and this one right over here, it actually only has two distinct zeros, or at least that's what it looks like. So I'd rule that one out as well. So this is definitely going to be the one that has four distinct zeros. Zeros are the x values at which the function is equal or the polynomial, in this case, which is a function of x, is going to be equal to zero, and you can see that's happening exactly four times.