# Solving Quadratic Equations By Factoring Practice Problems

So, if I look at the top row of this chart, I have a 2x and -6x.I need to ask myself what do those things have in common?Rewriting the terms from each side together in parentheses as binomials says that the factored form of this is (3x 2)(3x - 2).

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Factor 2x We'll start this problem very similarly to the simple factoring problems by looking for two numbers that fit the pattern.

The thing is, it's not going to be quite the same pattern.

First, the pattern we use to determine the pair of numbers that will help us find our answer now requires you to find two numbers that have a product equal to the constant times the leading coefficient, instead of simply being the leading coefficient itself like before.

Secondly, once you come up with the pair of numbers that fit the pattern, you must substitute those numbers into an area model and factor out the greatest common factors to determine the answer.

Putting the 2x If we can find what terms must have been on the outside of this chart to get multiplied in and give us what we have here, we'll be done.

We do this by dividing out the greatest common factor from each row and column of our chart.We do this by looking for a pair of numbers that have a product equal to the constant on the end of the trinomial and a sum equal to the - 3x - 10 into (x 2)(x - 5) by realizing that 2 * -5 = -10, and 2 -5 = -3. The goal is still the same - split the trinomial into a product of binomials - and we'll still find a lot of the same patterns, but now we'll have to make two slight changes in the process in order to end up with the correct answer.Let's go ahead and take a look at the example I just mentioned.Plus, get practice tests, quizzes, and personalized coaching to help you succeed.Try it risk-free Once you get good at factoring quadratics with 1x squared in the front of the expression, it's time to try ones with numbers other than 1.Going down a row to the bottom, 1x and -3, they don't have any factors with the numbers in common, and they also don't have any variables in common, which means the only thing I can divide out is a 1. What we now have on the left and above our little area model is our factored answer. For this one, they'll have to add up to zero (the middle term) and multiply to -36, which was the 9 in front times the -4 on the end.The terms that are on the same side are the terms that go in parentheses together to make up our two binomials, and I end up with (2x 1)(x - 3). Quickly looking through our options here and knowing that we're going to have to add up to zero makes it pretty obvious that 6 and -6 are going to be our winners. To be in the correct form, you must remove all parentheses from each side of the equation by distributing, combine all like terms, and finally set the equation equal to zero with the terms written in descending order. In this case, we need to remove all parentheses by distributing, combine like terms, and set the equation equal to zero with the terms written in descending order. In this case, we need to remove all parentheses by distributing, combine like terms, and set the equation equal to zero with the terms written in descending order. Due to the nature of the mathematics on this site it is best views in landscape mode.Well, 2 and 6 are both divisible by 2, so I can take out a 2.But they also both have an x, which means I also take out an x, so I can pull a 2x to the outside of that row. The numbers don't have anything in common but the variables do, which means I can take out 1x. Both share a -3, which means I divide that out and write it on top. Just think of this problem as being this one: Factor 9x 0x - 4. We begin by finding the two numbers that fit the pattern.

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