Linear and Quadratic Equations
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14 Terms
1
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(x + y)2
x2 + 2xy + y2
2
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x2 + 2xy + y2
(x + y)2
3
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(x - y)2
x2 - 2xy + y2
4
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x2 - 2xy + y2
(x - y)2
5
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(x + y)(x - y)
x2 - y2
6
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x2 - y2
(x + y)(x - y)
7
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(x + y)3
x3 + 3x2y + 3xy2 + y3
8
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x3 + 3x2y + 3xy2 + y3
(x + y)3
9
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(x - y)3
x3 - 3x2y + 3xy2 - y3
10
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x3 - 3x2y + 3xy2 - y3
(x - y)3
11
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Vieta’s Formula: If ax2 + bx + c has 2 solutions, then the SUM of roots is…
-b/a
12
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Vieta’s Formula: If ax2 + bx + c has 2 solutions, then the PRODUCT of roots is…
Vieta’s Formula: c/a
13
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How many quadratic solutions are there is the discriminant (b2 - 4ac) is positive, 0, negative?
positive → 2
0 → 1
negative → 0
14
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(x - y) / (y - x)
-1
Note 
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