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14 Cards in this Set
- Front
- Back
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What is solving a quadratic equation? |
Solving a quadratic equation means finding values for the unknown that fit |
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What are the roots of quadratic functions? |
The roots of a quadratic function are its solutions when it is equal to zero. |
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How can you solve equations in the form ax2+bx+c=0? |
By factorising |
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What are expressions such as (x+2)2, (x-1)2, and (x+1/2)2 called? |
Perfect squares |
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What is the completing the square equation that you get from x2+bx+c? |
(x+b/2)2-(b/2)2+c |
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How else can ax2+bx+c be written? |
(x+b/a x)2+c |
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What’s the definition of a simultaneous equation? |
When there are two unknowns, you need two equations to find their values |
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How many possible outcomes can a pair of quadratic and linear equations have? |
Two possible solutions |
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How do you find the coordinates where two graphs intersect? |
You solve their equations simultaneously |
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In an inequality time line, what does a blank circle, a black circle or an arrow mean? |
A blank circle means that the value is not included. A black circle means that the value is included. An arrow means that the solution carries towards infinity. |
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Can you rearrange an equality in the same way you can rearrange an equation? |
Yes |
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When inequalities have both an upper and lower limit, how do you solve it? |
You solve both sides separately |
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What is the best way to solve an inequality? |
Treat the inequality sign (<\>) as an equals sign |
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What do you do when you multiply or divide an inequality? |
You reverse the inequality signs |
