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13 cards from this deck
Finding values of xxx that make the equation true
If factors multiply to zero, one factor must be zero
Roots or x-intercepts
Rearrange to equal zero
(a−b)(a+b)(a-b)(a+b)(a−b)(a+b)
X-intercepts or roots
Two
Common factor
Zero product property
Substitute back into original equation
ax2+bx+c=0ax^2 + bx + c = 0ax2+bx+c=0
Common factors
Practical (e.g., lengths can't be negative)
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