Math algebraic factprization

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1) (x+3)^2 - (x+1)^2

2) (x-4)^2 - 16(x+2)^2

  • Math algebraic factprization -

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

    (x+3)^2 - (x+1)^2
    = ((x+3)-(x+1))((x+3)+(x+1))
    = (2)(2x+4)
    = 4x+8

    similarly for the other

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