# LESSON 7-2 PROBLEM SOLVING FACTORING BY GCF

You can then use the distributive property to rewrite the polynomial in a factored form. It involves organizing the polynomial in groups. Group terms of the polynomial into pairs. The correct answer is a 5 8 a — When we divide it out of the second term, we are left with There are several methods that can be used when factoring polynomials. When factoring a four-term polynomial using grouping, find the common factor of pairs of terms rather than the whole polynomial. Something to look forward to! Find the GCF of the list of monomials: The greatest common factor GCF for a polynomial is the largest monomial that is a factor of divides each term of the polynomial. Look for common factors between the factored forms of the paired terms. Even the best athletes and musicians had help along the way and lots of practice, practice, practice, to get good at their sport or instrument.

Properties of Real Numbers. When we divide it out of the second term, we are left with Factor out the like factor, 5, from the second group.

# Factoring by grouping (article) | Khan Academy

We have a 3, 9, and The following are webpages that can assist you in the topics that were covered on this page: If there is no common factor for all of the terms in the polynomial, another technique needs to be used to see if the polynomial can be factored. As you look at the examples of simple polynomials below, try to identify factors that the terms of the polynomial have in common. Factor out the GCF of a polynomial. Before we get started, it may be helpful for you to review the Dividing Factoding lesson.

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# Factoring Polynomials Using the GCF

lssson Find the GCF of the list of monomials: The fully factored polynomial will be the product of two binomials. As shown above when we divide 2 x by 2 x we get 1, so we need a 1 as the third term inside of the. Note that if all terms have the same variable, the GCF for the variable part is that variable raised to the lowest exponent that is listed. After completing this tutorial, you should be able to: In fact there is no such thing as too much practice.

Rewrite each term with the GCF as one lesspn. Putting this together we have a GCF of 3 xy. Just as any integer can be written as the product of factors, so too can any monomial or polynomial be expressed as a product of factors.

From a previous example, you found the GCF of 25 b 3 and sllving b 2 to be 5 b 2. A prime factor is similar to a prime number —it has only itself and 1 as factors. The next lesson is on factoring by using grouping. Example Problem Find the greatest common factor of 81 c 3 d and 45 c 2 d 2. Something to look forward to! Factoring is very helpful in simplifying and solving equations using polynomials. C a 5 a — 1 Incorrect. Divide the GCF out of every term of the polynomial. Others will be asking you for help with factoring.

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## Try Factor a Polynomial by Finding Its Greatest Common Factor

You correctly identified 5 b as a factor of one pair, leaving 2 a and factoribg, and 4 as the factor of the other pair, also leaving 2 a and 1.

Find the greatest common factor of 56 xy and 16 y 3. Recall that the distributive property of multiplication over addition states that a product of a number and a sum is the same as the sum of the products.

Hopefully you now understand how to factor polynomials if the polynomials have a greatest common factor. Product of a number and a sum: Factoring is to write an expression as a product of factors.

## Factoring by grouping

When the first term of the second group of two has a minus sign in front of it, you want to put the minus in front of the second. Note that this is not in factored form because of the minus sign we have before solvinng 7 in the problem.

To factor a polynomial, first identify the greatest common factor of the terms, and then apply the distributive property to rewrite the expression. Factor the common factor 5 out of the second group.