Question

factor x^2-y^2+2y-1

Answer 1

you can first write this as the difference of two squares
\[x^2-(y-1)^2\]

Answer 2

then us
\[a^2-b^2=(a+b)(a-b)\]with
\[a=x,b=y-1\]

Answer 3

oh isee now. thanks

Answer 4

yw