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