Are there any two factors of 20 that if I, and it's going to be, one of them's gonna be positive and one's going to be negative since their product gets us negative, where I add 'em together And the first temptation is see well can we, is there, is there any way that we can naturally factor this? So is there a, let's see. Now we have this quadratic in a form where we just need to figure out what x values are gonna make We could now subtractįive from both sides. And then we have minusġ5 is equal to five, is equal to five. We could say this is gonna be x squared and then these two terms, right over here, we can add together. And that's all going to be equal to, and that's all going to be equal to five. So what's that going to be? Well it's going to be x times x, which is x squared, plus Would do is just multiply out x plus three times x minus five. Here to get it into that form, but let's see if we can do it. So we've actually have to do a lot of algebraic manipulation Two things is equal to zero, because if the product of two things is equal to zero, then you know that either one or the both of them need to be equal to zero. The factoring useful, you have to be able to say, hey, the product of these Once I factored it out, maybe I could say, okay, maybe this needs to be equal to five, or this Have some experience with algebra that, hey, You wanna be very careful here because you're probably Three times x minus five is equal to five. What are all the solutions to the equation above? And we have x plus
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |