Hello guys, Welcome to Africa's Largest Video Search Engine, and you are watching The foil method for Multiplying Binomials ( Algebra ). and this video is uploaded by MooMooMath and Science at 2015-11-17T20:46:53-08:00. We are just promoting this video only for entertainment and educational purpose only. I hop you like our Video Search Engine. [V_KkmT-zAvI]
| Name | The foil method for Multiplying Binomials ( Algebra ) |
| Video Uploader | Video From MooMooMath and Science |
| Upload Date | This Video Uploaded At 18-11-2015 04:46:53 |
| Video Discription | Multiplying Binomials using the foil method. A binomial is a polynomial with two terms. The FOIL method stands for, F = First O = Outer I = Inner L = Last This video works three example problems in which the answer is a "difference of two squares". Instead of being the same sign the binomials will have an opposite sign. You will have a +4 x -4. Let's foil this out. First times first which equals x^2. Next is outer, x x 4 = 4 x,inner - 4 x -4x = -4x, and last 4 x -4 = -16. What do you notice about these terms? We had one of these in the last lesson.The signs are opposite so they cancel each other out, because 4x-4x cancel each other out. What we have left is x^2 and back here we have -16. This is called the difference of two squares. x^2 is a perfect square, and 16 is a perfect square, and difference means subtraction, so when you multiply these together you will end up with a binomial answer. Let's look at 2x -5 and 2x + 5, and see what happens with it? (or is it a z?) (2z - 5) (2z + 5) First 2z x 2z = 4 z, outer 10Z x , inner is -10z, and last is -25. Be very careful with the sign, bring down a 4z^2 and -25, and that is the product of a difference of squares. Now let's look at number 6. (4r +7y)(4r-7y) I will write out the answer and see if you can get it. Does the order matter? The order of product doesn't matter because think of 3 x 4 , and 4 x 3, you will get the same product so it doesn't matter. First, outer, inner, and last From there I can cross the middel terms out, and I get 16r^2 - 49y^2. There you go. -~-~~-~~~-~~-~- Please watch: "Study Skills Teacher's Secret Guide to your Best Grades" https://www.youtube.com/watch?v=f3bsg8gaSbw -~-~~-~~~-~~-~- [V_KkmT-zAvI] |
| Category | Education |
| Tags | algebra | FOIL Method | Binomial | binomials | Multiplication | difference two squares | polynomials | math | maths | foil method multiply binomials | foil method polynomials | how to multiply binomials using foil | foil method math |
