approximating area under a curve   2 videos

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  Multiplying Polynomials using Area Models

  Algebra Polynomials

  How to relate area of rectangles to multiplying polynomials.

  area binomial trinomial distributing
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  Estimating Square Roots

  Algebra Radical Expressions and Equations

  How to find square roots of integers.

  estimating square root approximation principal square root perfect square