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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math
Get ready for Geometry
Get ready for conic sections
Factoring quadratics with perfect squares
Factoring perfect squares
Factoring perfect squares
Sal factors 25x^2-30x+9 as (5x-3)^2 or as (-5x+3)^2.
License: CC BY-NC-SA by Khan Academy