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For more information, please see full course syllabus of Algebra 1
For more information, please see full course syllabus of Algebra 1
Algebra 1 Solving Quadratic Equations by Factoring
Lecture Description
A quadratic equation is an equation where the largest power present on a variable is two. Factoring can help solve quadratic equations because of the zero factor property. This property says that if the product of two numbers is zero, then one of the numbers (maybe both) must be zero. If the quadratic is set equal to zero, and then factored, then each factor can be set equal to zero and solved separately. Any of the previous factoring techniques for trinomials can be used such as reverse FOIL or the AC method. In this lesson you'll also learn how to solve some higher degree polynomials using this factoring process.
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2 answers
Last reply by: Suying Guo
Fri Jun 5, 2020 8:41 PM
Post by Ming Zhang on April 25, 2020
For example 5, what do you mean by inside and outside when you were doing the foil? I don't understand why you added the extra two X
2 answers
Mon Mar 23, 2020 1:25 PM
Post by frank fan on March 20, 2020
are there any practice questions?
3 answers
Tue Feb 4, 2020 1:18 PM
Post by litravis44 on January 30, 2020
Hi. In Example 4, WHY can you multiply -2 with 4 to get 8. I really wan't to know why you can do that. Thank you.
1 answer
Tue Aug 20, 2019 4:58 PM
Post by Eva Wu on August 15, 2019
In what way in Example 4 where the 7x becomes -x+8x?
1 answer
Wed Jul 16, 2014 8:12 PM
Post by patrick guerin on July 15, 2014
Thanks for the lecture!
1 answer
Wed Jul 16, 2014 8:12 PM
Post by patrick guerin on July 15, 2014
On example 3(3m2-9m=30), when you got to the zero factor property, could you possibly have it where you have 3(m+2) and 3(m+5) also with that problem?
1 answer
Wed Jul 16, 2014 8:04 PM
Post by patrick guerin on July 15, 2014
You said that some equations can be changed into the quadratic form. How would you know easily if they can be changed into a quadratic equation or not?
1 answer
Wed Apr 30, 2014 6:30 PM
Post by Fahad Chandia on April 30, 2014
In Example 5 you subtract x square from 2x square ,So reminder should b 2 not x Square .Can you explain to me ?
0 answers
Post by Fahad Chandia on April 30, 2014
if you put minus x 2