![]() Videos, you'll see that it is indeed x squared plusġ0x, plus 9. Out, using the skills we developed in the last few So we could factor thisĪs being x plus 1, times x plus 9. So a could be equal to 1, andī could be equal to 9. You'll have 3 plus 3- that doesn't equal 10. So what are the factors of 9? They're 1, 3, and 9. And normally when we'reįactoring, especially when we're beginning to factor, ![]() What are the factors of 9? What are the things that aĪnd b could be equal to? And we're assuming thatĮverything is an integer. Match this to that? Is there some a and b whereĪ plus b is equal to 10? And a times b is equal to 9? Well, let's just think about Middle coefficient on the x term, or you could say theįirst degree coefficient there, that's going to be ![]() This is the product of two binomials, we see that this Plus- I can write it as b plus a, or a plusī, x, plus ab. In the middle right here, because they're bothĬoefficients of x. X squared, plus x times b, which is bx, plus a times x, Two things, what happens? Well, we have a little bit What happens if we were to take x plus a, and multiply How do we do that? Well, let's just think about Quadratic expression, x squared plus 10x, plus 9. In this case, in all of theĮxamples we'll do, it'll be x. Have a variable raised to the second power. Polynomial, or just a quadratic itself, or quadraticĮxpression, but all it means is a second degree polynomial. Bunch of examples of factoring a second degree polynomial,
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