Homework Help: Math (URGENT)

Posted by John on Thursday, April 22, 2010 at 11:07pm.

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) - jen, Thursday, April 22, 2010 at 11:50pm
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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