Special products and factoring

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Special products and factoring

Factoring a polynomial is the opposite process of multiplying polynomials. When we factor a polynomial, we are looking for simpler polynomials that can be multiplied together to give us the polynomial that we started with.

You might want to review multiplying polynomials if you are not completely clear on how that works. When we factor a polynomial, we are usually only interested in breaking it down into polynomials that have integer coefficients and constants.

Removing Common Factors The simplest type of factoring is when there is a factor common to every term. In that case, you can factor out that common factor. What you are doing is using the distributive law in reverse—you are sort of un-distributing the factor.

Special products and factoring

We are interested here in factoring quadratic trinomials with integer coefficients into factors that have integer coefficients. Not all such quadratic polynomials can be factored over the real numbers, and even fewer into integers they all can be factored of we allow for imaginary numbers and rational coefficients, but we don't.

Therefore, when we say a quadratic can be factored, we mean that we can write the factors with only integer coefficients.

Special products and factoring

If a quadratic can be factored, it will be the product of two first-degree binomials, except for very simple cases that just involve monomials. For example x2 by itself is a quadratic expression where the coefficient a is equal to 1, and b and c are zero. Obviously, x2 factors into x xbut this is not a very interesting case.

A slightly more complicated case occurs when only the coefficient c is zero. Obviously the x2 came from x times x. The last term in the trinomial, the 6 in this case, came from multiplying the 2 and the 3.

Where did the 5x in the middle come from? We got the 5x by adding the 2x and the 3x when we collected like terms. We can state this as a rule: If the coefficient of x2 is one, then to factor the quadratic you need to find two numbers that: Multiply to give the constant term which we call c 2.

Add to give the coefficient of x which we call b This rule works even if there are minus signs in the quadratic expression assuming that you remember how to add and multiply positive and negative numbers.

Recall from special products of binomials that and The trinomials on the right are called perfect squares because they are the squares of a single binomial, rather than the product of two different binomials. A quadratic trinomial can also have this form:Shop a wide selection of Federal AutoMatchLR Champion Rifle Ammo – Rounds at DICKS Sporting Goods and order online for the finest quality products from the top brands you ph-vs.com: $ Special products of polynomials In the previous section we showed you how to multiply binominals.

Solving quadratics by factoring

There are a couple of special instances where there are easier ways to find the product of two binominals than multiplying each term in the first binomial with all terms in the second binomial.

Nov 15,  · This feature is not available right now. Please try again later. In number theory, integer factorization is the decomposition of a composite number into a product of smaller integers. If these integers are further restricted to prime numbers, the process is called prime factorization..

When the numbers are sufficiently large, no efficient, non-quantum integer factorization algorithm is known. An effort by several researchers, concluded in , to factor a. - [Voiceover] So let's say that we've got the polynomial 16x to the third plus 24x squared plus nine x.

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Now what I'd like you to do is pause the video and see if you could factor this polynomial completely. We (I keep saying "we" because I'm part of a special PD team for three-part lessons. Myself and another teacher (grade 2/3) team teach these lessons.

Special products of polynomials (Algebra 1, Factoring and polynomials) – Mathplanet