Quadratic equations - card sort
x2 + 3x + 2 = 0
x2 + 3x - 4 = 0
(x + 1)(x + 2) = 0
(x - 1)(x + 4) = 0
x + 1 = 0 or x + 2 = 0
x - 1 = 0 or x + 4 = 0
x = -1 or x = -2
x = 1 or x = -4
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Quadratic equations - card sort
x2 - x - 2 = 0
x2 - 3x + 2 = 0
(x + 1)(x - 2) = 0
(x - 1)(x - 2) = 0
x + 1 = 0 or x - 2 = 0
x - 1 = 0 or x - 2 = 0
x = -1 or x = 2
x = 1 or x = 2
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Page 2 of 5
Quadratic equations - card sort
x2 + 4x - 5 = 0
x2 + 5x + 6 = 0
(x + 5)(x - 1) = 0
(x + 2)(x + 3) = 0
x + 5 = 0 or x - 1 = 0
x + 2 = 0 or x + 3 = 0
x = -5 or x = 1
x = -2 or x = -3
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Page 3 of 5
Quadratic equations - card sort
x2 - x - 6 = 0
x2 - 4x + 3 = 0
(x - 3)(x + 2) = 0
(x - 1)(x - 3) = 0
x - 3 = 0 or x + 2 = 0
x - 1 = 0 or x - 3 = 0
x = 3 or x = -2
x = 1 or x = 3
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Quadratic equations - card sort
Teacher Notes
The 4 sheets need to be laminated and cut up to have a graph and 4 algebra statements per quadratic equation, 40 cards in all.
The activity works best in pairs or small groups.
Ask the group to sort the cards so they show the correct solution of the 8 quadratics, with their corresponding graphical
representation.
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