Factoring Difference of Squares

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What is the first step when factoring a polynomial?

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Look for the GCF (Greatest Common Factor).

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(2x - 3)(2x + 3)

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CCSS.HSA.APR.C.4

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(x - 10)(x + 10)

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CCSS.HSA.APR.C.4

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(x - 20)(x + 20)

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CCSS.HSA.APR.C.4

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4(3x - 4)(3x + 4)

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CCSS.HSA.APR.C.4

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What is the difference of squares formula?

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a^2 - b^2 = (a - b)(a + b)

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CCSS.HSA.APR.C.4

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4x

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What does it mean for an expression to be prime in the context of factoring?

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An expression is prime if it cannot be factored into simpler polynomials.

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(x - 5)(x + 5)

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CCSS.HSA.APR.C.4

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(3x - 4)(3x + 4)

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CCSS.HSA.APR.C.4