Question

factoring: 9y² -900

Answer 1

\[\large 9y^2 -900\]


\[\large 9(y^2 -100)\]


\[\large 9(y^2 -10^2)\]


\[\large 9(y-10)(y+10)\]


So \[\large 9y^2 -900=9(y-10)(y+10)\]

Answer 2

9(y^2-100) = 9(y-10)(y+10(

Answer 3

9(y^2-100)
9(y-10)(y+10)

Answer 4

\[(a+b)(a-b)=a^{2}+ab-ab+b^{2}\]

Let: \[a^{2}=9y^2\]\[b^{2}=900\]