Solve Quadratic Equationsby Graphing - Example 2
Solving Quadratic Equationsby Completingthe Square - Example 2
The Discriminant - Example 2
Adding Subtracting And Multiplying Complex Numbers - Example 3
Complexand Imaginary Numbers - Example 3
Liberty University
Solve Quadratic Equationsby Factoring - Example 2


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erratic equation. X squared plus three X minus 18 equals zero. We're going to solve it by factory. In this case are a of course, one so we can move into factories. We don't have to rearrange anything. So we're gonna find two factors of negative 18 that are gonna give me positive three. So if I list my factors of 18, I would have 18 and negative one, and that would give me 17. We'd have nine, and negative too, would give May 7. We would have six and negative three, which would give me positive three. So right here are the two numbers we're gonna use for our factors. So we know to get X square. That's X Times X. So that's why I'm putting eggs in each parentheses we have X Plus six and X minus three would equal zero. So now that we've got our factors, let's write them out and make each of equal zero just off. So X plus six equals zero x minus three. Cool. Zero. We're going to subtract six on both sides, so X equals negative six and then we'll add three to both sides. An ex will equal positive three. So this tells me that my solutions are negative. Six and positive three

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