Transform each function into the form of f(x)=a(x-h)²+k

1.f(x)=x²-2x-1
2.f(x)=x²-6x+8
3.f(x)=-x²+4x+5
4.f(x)=-4x²+4x+1
5.f(x)=x²-4x+6
6.f(x)=x²-2x-3
7.f(x)=-x²4x+6
8.f(x)=x²-9
9.f(x)=x²+x
10.f(x)=4x²+8x-3
11.f(x)=x²+2x-5
12.f(x)=-x²-4x+3

Need ko na po please​