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12 cards from this deck
Power of 2 (e.g., x2x^2x2)
Three
Factorising, quadratic formula, completing the square
Always get two answers
Positive & negative numbers squared give same value
x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2a−b±b2−4ac
ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0
No real solutions
Rearrange equation to equal zero
Both positive and negative values
Factor it out first
Consider both +ve and -ve roots
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