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Math (URGENT)

posted by on .

Expand and simplify.

12-2(3y-2)(3y+2)-(2y+5)(2y+5)

Textbook Answer: -22y^2-20y-5

I don't know how to get that. Can someone show me the step by step process?

thank you very much.

  • Math (URGENT) - ,

    12-2(9y^2-4)-(4y^2+20y+25)
    12-18y^2+8-4y^2-20y-25
    combine like terms
    -22y^2-20Y-5

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